diff --git a/content/media/video/public/nsWaveDecoder.h b/content/media/video/public/nsWaveDecoder.h
index e65ca4e3278c..29ab1fc40309 100644
--- a/content/media/video/public/nsWaveDecoder.h
+++ b/content/media/video/public/nsWaveDecoder.h
@@ -252,6 +252,13 @@ private:
   // underlying channel type.
   nsAutoPtr<nsMediaStream> mStream;
 
+  // The media time of the last requested seek.  This has not been validated
+  // against the current media, so may be out of bounds.  Set when
+  // Seek(float) is called, and passed to the state machine when the
+  // SeekStarted event fires to tell it to update its time offset.  The
+  // state machine will validate the offset against the current media.
+  float mTimeOffset;
+
   // Copy of the current time and duration when the state machine was
   // disposed.  Used to respond to time and duration queries with sensible
   // values after playback has ended.
diff --git a/content/media/video/src/nsWaveDecoder.cpp b/content/media/video/src/nsWaveDecoder.cpp
index 3ae6783c2df0..76390739bc54 100644
--- a/content/media/video/src/nsWaveDecoder.cpp
+++ b/content/media/video/src/nsWaveDecoder.cpp
@@ -151,6 +151,11 @@ public:
   // Main state machine loop.  Runs forever, until shutdown state is reached.
   NS_IMETHOD Run();
 
+  // Called by the decoder when the SeekStarted event runs.  This ensures
+  // the current time offset of the state machine is updated to the new seek
+  // position at the appropriate time.
+  void UpdateTimeOffset(float aTime);
+
 private:
   // Change the current state and wake the playback thread if it is waiting
   // on mMonitor.  Used by public member functions called from both threads,
@@ -281,7 +286,7 @@ private:
   float mInitialVolume;
 
   // Time position (in seconds) to offset current time from audio stream.
-  // Set by calling Seek(float) when seeking, and when the stream is closed
+  // Set when the seek started event runs and when the stream is closed
   // during shutdown.
   float mTimeOffset;
 
@@ -290,6 +295,9 @@ private:
   // Available() reports).
   PRPackedBool mExpectMoreData;
 
+  // Time position (in seconds) to seek to.  Set by Seek(float).
+  float mSeekTime;
+
   // True once metadata has been parsed and validated. Users of mSampleRate,
   // mChannels, mSampleSize, mSampleFormat, mWaveLength, mWavePCMOffset must
   // check this flag before assuming the values are valid.
@@ -316,6 +324,7 @@ nsWaveStateMachine::nsWaveStateMachine(nsWaveDecoder* aDecoder, nsMediaStream* a
     mInitialVolume(aInitialVolume),
     mTimeOffset(0.0),
     mExpectMoreData(PR_TRUE),
+    mSeekTime(0.0),
     mMetadataValid(PR_FALSE)
 {
   mMonitor = nsAutoMonitor::NewMonitor("nsWaveStateMachine");
@@ -379,9 +388,9 @@ nsWaveStateMachine::Seek(float aTime)
 {
   nsAutoMonitor monitor(mMonitor);
   mNextState = mState;
-  mTimeOffset = NS_MIN(aTime, BytesToTime(mWaveLength));
-  if (mTimeOffset < 0.0) {
-    mTimeOffset = 0.0;
+  mSeekTime = NS_MIN(aTime, BytesToTime(mWaveLength));
+  if (mSeekTime < 0.0) {
+    mSeekTime = 0.0;
   }
   ChangeState(STATE_SEEKING);
 }
@@ -391,7 +400,15 @@ nsWaveStateMachine::GetDuration()
 {
   nsAutoMonitor monitor(mMonitor);
   if (mMetadataValid) {
-    return BytesToTime(mWaveLength);
+    PRUint32 length = mWaveLength;
+    PRInt64 contentLength = mDecoder->GetTotalBytes();
+    // If the decoder has a valid content length, and it's shorter than the
+    // expected length of the PCM data, calculate the playback duration from
+    // the content length rather than the expected PCM data length.
+    if (contentLength >= 0 && contentLength - mWavePCMOffset < length) {
+      length = contentLength - mWavePCMOffset;
+    }
+    return BytesToTime(length);
   }
   return std::numeric_limits<float>::quiet_NaN();
 }
@@ -562,6 +579,9 @@ nsWaveStateMachine::Run()
       {
         CloseAudioStream();
 
+        mSeekTime = NS_MIN(mSeekTime, GetDuration());
+        float seekTime = mSeekTime;
+
         monitor.Exit();
         nsCOMPtr<nsIRunnable> startEvent =
           NS_NEW_RUNNABLE_METHOD(nsWaveDecoder, mDecoder, SeekingStarted);
@@ -572,8 +592,12 @@ nsWaveStateMachine::Run()
           break;
         }
 
-        PRInt64 position = RoundDownToSample(TimeToBytes(mTimeOffset)) + mWavePCMOffset;
-        NS_ABORT_IF_FALSE(position >= 0 && position <= mWaveLength + mWavePCMOffset, "Invalid seek position");
+        // Calculate relative offset within PCM data.
+        PRInt64 position = RoundDownToSample(TimeToBytes(seekTime));
+        NS_ABORT_IF_FALSE(position >= 0 && position <= mWaveLength, "Invalid seek position");
+
+        // Convert to absolute offset within stream.
+        position += mWavePCMOffset;
 
         monitor.Exit();
         nsresult rv = mStream->Seek(nsISeekableStream::NS_SEEK_SET, position);
@@ -592,7 +616,7 @@ nsWaveStateMachine::Run()
         NS_DispatchToMainThread(stopEvent, NS_DISPATCH_SYNC);
         monitor.Enter();
 
-        if (mState != STATE_SHUTDOWN) {
+        if (mState == STATE_SEEKING && mSeekTime == seekTime) {
           ChangeState(mNextState);
         }
       }
@@ -649,6 +673,16 @@ nsWaveStateMachine::Run()
   return NS_OK;
 }
 
+void
+nsWaveStateMachine::UpdateTimeOffset(float aTime)
+{
+  nsAutoMonitor monitor(mMonitor);
+  mTimeOffset = NS_MIN(aTime, GetDuration());
+  if (mTimeOffset < 0.0) {
+    mTimeOffset = 0.0;
+  }
+}
+
 void
 nsWaveStateMachine::ChangeState(State aState)
 {
@@ -915,6 +949,7 @@ nsWaveDecoder::nsWaveDecoder()
   : mBytesDownloaded(0),
     mInitialVolume(1.0),
     mStream(nsnull),
+    mTimeOffset(0.0),
     mEndedCurrentTime(0.0),
     mEndedDuration(std::numeric_limits<float>::quiet_NaN()),
     mNotifyOnShutdown(PR_FALSE),
@@ -955,8 +990,10 @@ nsWaveDecoder::GetCurrentTime()
 nsresult
 nsWaveDecoder::Seek(float aTime)
 {
+  mTimeOffset = aTime;
+
   if (mPlaybackStateMachine) {
-    mPlaybackStateMachine->Seek(aTime);
+    mPlaybackStateMachine->Seek(mTimeOffset);
     return NS_OK;
   }
   return NS_ERROR_FAILURE;
@@ -1255,6 +1292,10 @@ nsWaveDecoder::SeekingStarted()
     return;
   }
 
+  if (mPlaybackStateMachine) {
+    mPlaybackStateMachine->UpdateTimeOffset(mTimeOffset);
+  }
+
   if (mElement) {
     mElement->SeekStarted();
   }
diff --git a/content/media/video/test/Makefile.in b/content/media/video/test/Makefile.in
index e1ab6a9ce37b..5e3118c38475 100644
--- a/content/media/video/test/Makefile.in
+++ b/content/media/video/test/Makefile.in
@@ -71,12 +71,23 @@ _TEST_FILES = 	test_autoplay.html \
                 test_volume.html \
                 test_wav_8bit.html \
                 test_wav_ended1.html \
+                test_wav_seek3.html \
+                test_wav_seek4.html \
+                test_wav_seek5.html \
+                test_wav_seek6.html \
+                test_wav_seek7.html \
+                test_wav_seek8.html \
                 test_wav_seek_past_end.html \
                 test_wav_seek_then_play.html \
+                test_wav_trailing.html \
+                test_wav_trunc.html \
+                test_wav_trunc_seek.html \
                 320x240.ogg \
                 bug461281.ogg \
                 seek.ogg \
                 r11025_s16_c1.wav \
+                r11025_s16_c1_trailing.wav \
+                r11025_s16_c1_trunc.wav \
                 r11025_u8_c1.wav \
 #                test_bug448534.html \
                 $(NULL)
diff --git a/content/media/video/test/r11025_s16_c1_trailing.wav b/content/media/video/test/r11025_s16_c1_trailing.wav
new file mode 100644
index 000000000000..af53beaf255b
Binary files /dev/null and b/content/media/video/test/r11025_s16_c1_trailing.wav differ
diff --git a/content/media/video/test/r11025_s16_c1_trunc.wav b/content/media/video/test/r11025_s16_c1_trunc.wav
new file mode 100644
index 000000000000..4a8f2c0e4f9d
Binary files /dev/null and b/content/media/video/test/r11025_s16_c1_trunc.wav differ
diff --git a/content/media/video/test/test_seek1.html b/content/media/video/test/test_seek1.html
index 93d83a26ec2f..0040468f5f82 100644
--- a/content/media/video/test/test_seek1.html
+++ b/content/media/video/test/test_seek1.html
@@ -22,9 +22,10 @@ var seekFlagEnd = false;
 var readonly = true;
 var completed = false;
 
-ok(!document.getElementById('v').seeking, "seeking should default to false");
+var v = document.getElementById('v');
+ok(!v.seeking, "seeking should default to false");
 try {
-  v1.seeking = 1;
+  v.seeking = 1;
   readonly = false;
 }
 catch(e) {
diff --git a/content/media/video/test/test_seek8.html b/content/media/video/test/test_seek8.html
index 2801abe5bcd9..5655bb53b2a0 100644
--- a/content/media/video/test/test_seek8.html
+++ b/content/media/video/test/test_seek8.html
@@ -45,7 +45,7 @@ function startTest() {
   completed = true;
   ok(thrown1, "Setting currentTime to invalid value of NaN");
   ok(thrown2, "Setting currentTime to invalid value of -1");
-  ok(thrown2, "Setting currentTime to invalid value of a function");
+  ok(thrown3, "Setting currentTime to invalid value of a function");
   SimpleTest.finish();
   return false;
 }
diff --git a/content/media/video/test/test_wav_seek3.html b/content/media/video/test/test_wav_seek3.html
new file mode 100644
index 000000000000..ba908dda19cc
--- /dev/null
+++ b/content/media/video/test/test_wav_seek3.html
@@ -0,0 +1,68 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Wave Media test: seek test 3</title>
+  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<audio id='v'
+       onloadedmetadata='return startTest();'
+       onended='return playbackEnded();'
+       onseeking='return seekStarted();'
+       onseeked='return seekEnded();'>
+  <source type='audio/x-wav' src='r11025_s16_c1.wav'>
+</audio>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+// Test seeking works if current time is set before audio is
+// playing.
+var startPassed = false;
+var endPassed = false;
+var completed = false;
+
+function startTest() {
+  if (completed)
+    return false;
+
+  var v = document.getElementById('v');
+  v.currentTime=0.5;
+  v.play();
+  return false;
+}
+
+function seekStarted() {
+  if (completed)
+    return false;
+
+  startPassed = true;
+  return false;
+}
+
+function seekEnded() {
+  if (completed)
+    return false;
+
+  var t = document.getElementById('v').currentTime;
+  ok(t >= 0.4 && t <= 0.6, "Video currentTime should be around 0.5: " + t);
+  endPassed = true;
+  return false;
+}
+
+function playbackEnded() {
+  if (completed)
+    return false
+
+  completed = true;
+  ok(startPassed, "send seeking event");
+  ok(endPassed, "send seeked event");
+  SimpleTest.finish();
+  return false;
+}
+
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/content/media/video/test/test_wav_seek4.html b/content/media/video/test/test_wav_seek4.html
new file mode 100644
index 000000000000..fa9bfef0e4b3
--- /dev/null
+++ b/content/media/video/test/test_wav_seek4.html
@@ -0,0 +1,54 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Wave Media test: seek test 4</title>
+  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<audio id='v'
+       onloadedmetadata='return startTest();'
+       onseeking='return seekStarted();'
+       onseeked='return seekEnded();'>
+  <source type='audio/x-wav' src='r11025_s16_c1.wav'>
+</audio>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+// Test seeking works if current time is set but audio is not played.
+var startPassed = false;
+var completed = false;
+
+function startTest() {
+  if (completed)
+    return false;
+
+  var v = document.getElementById('v');
+  v.currentTime=0.5;
+  return false;
+}
+
+function seekStarted() {
+  if (completed)
+    return false;
+
+  startPassed = true;
+  return false;
+}
+
+function seekEnded() {
+  if (completed)
+    return false;
+
+  var t = document.getElementById('v').currentTime;
+  ok(t >= 0.4 && t<= 0.6, "Video currentTime should be around 0.5: " + t);
+  completed = true;
+  SimpleTest.finish();
+  return false;
+}
+
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/content/media/video/test/test_wav_seek5.html b/content/media/video/test/test_wav_seek5.html
new file mode 100644
index 000000000000..3d897cf9ed4f
--- /dev/null
+++ b/content/media/video/test/test_wav_seek5.html
@@ -0,0 +1,71 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Wave Media test: seek test 5</title>
+  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<audio id='v'
+       onloadedmetadata='return startTest();'
+       onseeking='return seekStarted();'
+       onseeked='return seekEnded();'>
+  <source type='audio/x-wav' src='r11025_s16_c1.wav'>
+</audio>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+// Test for a seek, followed by another seek before the first is complete.
+var startPassed = false;
+var seek1Passed = false;
+var seek2Passed = false;
+var seekCount = 0;
+var completed = false;
+
+function startTest() {
+  if (completed)
+    return false;
+
+  var v = document.getElementById('v');
+  v.currentTime=0.8;
+  return false;
+}
+
+function seekStarted() {
+  if (completed)
+    return false;
+
+  startPassed = true;
+  var v = document.getElementById('v');
+  v.currentTime=0.5;
+  return false;
+}
+
+function seekEnded() {
+  if (completed)
+    return false;
+  var v = document.getElementById('v');
+  seekCount++;
+  if(seekCount == 1) {
+    if (v.currentTime >= 0.7 && v.currentTime <= 0.9)
+      seek1Passed = true;
+  }
+
+  if(seekCount == 2) {
+    if (v.currentTime >= 0.4 && v.currentTime <= 0.6)
+      seek2Passed = true;
+
+    ok(seek1Passed, "First seek");
+    ok(seek2Passed, "Second seek");
+    completed = true;
+    SimpleTest.finish();
+  }
+
+  return false;
+}
+
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/content/media/video/test/test_wav_seek6.html b/content/media/video/test/test_wav_seek6.html
new file mode 100644
index 000000000000..c7224665c56d
--- /dev/null
+++ b/content/media/video/test/test_wav_seek6.html
@@ -0,0 +1,63 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Wave Media test: seek test 6</title>
+  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<audio id='v'
+       onloadedmetadata='return startTest();'
+       onended='return playbackEnded();'
+       onseeking='return seekStarted();'
+       onseeked='return seekEnded();'>
+  <source type='audio/x-wav' src='r11025_s16_c1.wav'>
+</audio>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+// Test for a seek, followed by a play before the seek completes, ensure we play at the end of the seek.
+var startPassed = false;
+var completed = false;
+var seekCount = 0;
+
+function startTest() {
+  if (completed)
+    return false;
+
+  var v = document.getElementById('v');
+  v.currentTime=0.5;
+  return false;
+}
+
+function seekStarted() {
+  if (completed)
+    return false;
+  startPassed = true;
+  var v = document.getElementById('v');
+  v.play();
+  return false;
+}
+
+function seekEnded() {
+  if (completed)
+    return false;
+  var v = document.getElementById('v');
+  ok(v.currentTime>=0.4 && v.currentTime<=0.6, "First seek");
+  return false;
+}
+
+function playbackEnded() {
+  if (completed)
+    return false;
+  ok(true, "Playback ended");
+  completed = true;
+  SimpleTest.finish();
+  return false;
+}
+
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/content/media/video/test/test_wav_seek7.html b/content/media/video/test/test_wav_seek7.html
new file mode 100644
index 000000000000..91631ab4d4b1
--- /dev/null
+++ b/content/media/video/test/test_wav_seek7.html
@@ -0,0 +1,60 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Wave Media test: seek test 7</title>
+  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<audio id='v'
+       onloadedmetadata='return startTest();'
+       onseeked='return seekEnded();'>
+  <source type='audio/x-wav' src='r11025_s16_c1.wav'>
+</audio>
+<pre id="test">
+<script class="testbody" type="text/javascript;version=1.7">
+// Test for bug identified by Chris Pearce in comment 40 on
+// bug 449159.
+var v = document.getElementById('v');
+var seekCount = 0;
+var completed = false;
+var interval;
+
+function startTest() {
+  if (completed)
+    return false;
+
+  var seek = function () {
+    var i = 0;
+    for (;;) {
+      i += 0.1;
+      if (i > 1)
+        i = 0;
+      yield i;
+    }
+  }();
+
+  interval = setInterval(function() { v.currentTime=seek.next(); }, 10);
+  return false;
+}
+
+function seekEnded() {
+  if (completed)
+    return false;
+
+  seekCount++;
+  ok(true, "Seek " + seekCount);
+  if (seekCount == 3) {
+    clearInterval(interval);
+    completed = true;
+    SimpleTest.finish();
+  }
+  return false;
+}
+
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/content/media/video/test/test_wav_seek8.html b/content/media/video/test/test_wav_seek8.html
new file mode 100644
index 000000000000..16d7cc995d9a
--- /dev/null
+++ b/content/media/video/test/test_wav_seek8.html
@@ -0,0 +1,58 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Wave Media test: seek test 8</title>
+  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<audio id='v'
+       onloadedmetadata='return startTest();'>
+  <source type='audio/x-wav' src='r11025_s16_c1.wav'>
+</audio>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+// If a NaN is passed to currentTime, make sure this is caught
+// otherwise an infinite loop in the Wave backend occurs.
+var v = document.getElementById('v');
+var completed = false;
+var thrown1 = false;
+var thrown2 = false;
+var thrown3 = false;
+
+function startTest() {
+  if (completed)
+    return false;
+
+  try {
+    v.currentTime = NaN;
+  } catch(e) {
+    thrown1 = true;
+  }
+
+  try {
+    v.currentTime = -1;
+  } catch(e) {
+    thrown2 = true;
+  }
+
+  try {
+    v.currentTime = Math.random;
+  } catch(e) {
+    thrown3 = true;
+  }
+
+  completed = true;
+  ok(thrown1, "Setting currentTime to invalid value of NaN");
+  ok(thrown2, "Setting currentTime to invalid value of -1");
+  ok(thrown3, "Setting currentTime to invalid value of a function");
+  SimpleTest.finish();
+  return false;
+}
+
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/content/media/video/test/test_wav_trailing.html b/content/media/video/test/test_wav_trailing.html
new file mode 100644
index 000000000000..f5a4e0201fd3
--- /dev/null
+++ b/content/media/video/test/test_wav_trailing.html
@@ -0,0 +1,46 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Wave Media test: playback ends when file has trailing non-PCM data</title>
+  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<audio id='v'
+       onloadedmetadata='return startTest();'
+       onended='return playbackEnded();'>
+  <source type='audio/x-wav' src='r11025_s16_c1_trailing.wav'>
+</audio>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+// Test if the ended event works correctly.
+var v = document.getElementById('v');
+var endPassed = false;
+var completed = false;
+
+function startTest() {
+  if (completed)
+    return false;
+
+  v.play();
+  return false;
+}
+
+function playbackEnded() {
+  if (completed)
+    return false
+
+  completed = true;
+  ok(v.currentTime >= 0.9 && v.currentTime <= 1.1,
+     "Checking currentTime at end: " + v.currentTime);
+  ok(v.ended, "Checking playback has ended");
+  SimpleTest.finish();
+  return false;
+}
+
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/content/media/video/test/test_wav_trunc.html b/content/media/video/test/test_wav_trunc.html
new file mode 100644
index 000000000000..d07fb400070b
--- /dev/null
+++ b/content/media/video/test/test_wav_trunc.html
@@ -0,0 +1,48 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Wave Media test: playback ends when file is truncated</title>
+  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<audio id='v'
+       onloadedmetadata='return startTest();'
+       onended='return playbackEnded();'>
+  <source type='audio/x-wav' src='r11025_s16_c1_trunc.wav'>
+</audio>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+// Test if the ended event works correctly.
+var v = document.getElementById('v');
+var endPassed = false;
+var completed = false;
+
+function startTest() {
+  if (completed)
+    return false;
+
+  ok(v.duration > 0.3 && v.duration < 0.5, "Duration should be around 0.4: " + v.duration);
+
+  v.play();
+  return false;
+}
+
+function playbackEnded() {
+  if (completed)
+    return false
+
+  completed = true;
+  ok(v.currentTime >= 0.3 && v.currentTime <= 0.5,
+     "Checking currentTime at end: " + v.currentTime);
+  ok(v.ended, "Checking playback has ended");
+  SimpleTest.finish();
+  return false;
+}
+
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/content/media/video/test/test_wav_trunc_seek.html b/content/media/video/test/test_wav_trunc_seek.html
new file mode 100644
index 000000000000..662b53c87a6f
--- /dev/null
+++ b/content/media/video/test/test_wav_trunc_seek.html
@@ -0,0 +1,54 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Wave Media test: seeking in truncated file</title>
+  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<audio id='v'
+       onloadedmetadata='return startTest();'
+       onseeked='return endSeek();'
+       onended='return endTest();'>
+  <source type='audio/x-wav' src='r11025_s16_c1_trunc.wav'>
+</audio>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+// Test if the ended event works correctly.
+var v = document.getElementById('v');
+var endPassed = false;
+var completed = false;
+
+function startTest() {
+  if (completed)
+    return false;
+
+  ok(v.duration > 0.3 && v.duration < 0.5, "Duration should be around 0.4: " + v.duration);
+
+  v.currentTime = 1.0;
+  return false;
+}
+
+function endTest() {
+  ok(v.ended, "Checking ended set after seeking to EOF and playing");
+  SimpleTest.finish();
+  return false;
+}
+
+function endSeek() {
+  if (completed)
+    return false
+
+  completed = true;
+  ok(v.currentTime >= 0.3 && v.currentTime <= 0.5,
+     "Checking currentTime at end: " + v.currentTime);
+  v.play();
+  return false;
+}
+
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>