Bug 581738 - temporarily disable test_punycodeURIs.js on Windows 7

uriloader/exthandler/tests/unit/test_punycodeURIs.js

@@ -93,6 +93,20 @@ function checkFile() {
 }
 
 function run_test() {
+  // Disable test on Windows 7 -- bug 581738
+  let isWin7OrHigher = false;
+  let isWindows = ("@mozilla.org/windows-registry-key;1" in Components.classes);
+  if (isWindows) {
+    try {
+      let version = Cc["@mozilla.org/system-info;1"]
+                      .getService(Ci.nsIPropertyBag2)
+                      .getProperty("version");
+      isWin7OrHigher = (parseFloat(version) >= 6.1);
+    } catch (ex) { }
+  }
+  if (isWin7OrHigher)
+    return;
+
   // set up the uri to test with
   var ioService =
     Components.classes["@mozilla.org/network/io-service;1"]