diff --git a/toolkit/mozapps/extensions/nsBlocklistService.js b/toolkit/mozapps/extensions/nsBlocklistService.js
index bb7a2e4c38f9..883fba0e6b19 100644
--- a/toolkit/mozapps/extensions/nsBlocklistService.js
+++ b/toolkit/mozapps/extensions/nsBlocklistService.js
@@ -47,6 +47,7 @@ const Cr = Components.results;
 Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
 Components.utils.import("resource://gre/modules/FileUtils.jsm");
 Components.utils.import("resource://gre/modules/AddonManager.jsm");
+Components.utils.import("resource://gre/modules/Services.jsm");
 
 const TOOLKIT_ID                      = "toolkit@mozilla.org"
 const KEY_PROFILEDIR                  = "ProfD";
@@ -637,10 +638,25 @@ Blocklist.prototype = {
       }
 
       var childNodes = doc.documentElement.childNodes;
-      this._addonEntries = this._processItemNodes(childNodes, "em",
-                                                  this._handleEmItemNode);
-      this._pluginEntries = this._processItemNodes(childNodes, "plugin",
-                                                   this._handlePluginItemNode);
+      for (var i = 0; i < childNodes.length; ++i) {
+        var element = childNodes[i];
+        if (!(element instanceof Ci.nsIDOMElement))
+          continue;
+        switch (element.localName) {
+        case "emItems":
+          this._processItemNodes(element.childNodes, "em",
+                                 this._handleEmItemNode);
+          break;
+        case "pluginItems":
+          this._processItemNodes(element.childNodes, "plugin",
+                                 this._handleEmItemNode);
+          break;
+        default:
+          Services.obs.notifyObservers(element,
+                                       "blocklist-data-" + element.localName,
+                                       null);
+        }
+      }
     }
     catch (e) {
       LOG("Blocklist::_loadBlocklistFromFile: Error constructing blocklist " + e);
@@ -649,21 +665,8 @@ Blocklist.prototype = {
     fileStream.close();
   },
 
-  _processItemNodes: function(deChildNodes, prefix, handler) {
+  _processItemNodes: function(itemNodes, prefix, handler) {
     var result = [];
-    var itemNodes;
-    var containerName = prefix + "Items";
-    for (var i = 0; i < deChildNodes.length; ++i) {
-      var emItemsElement = deChildNodes.item(i);
-      if (emItemsElement instanceof Ci.nsIDOMElement &&
-          emItemsElement.localName == containerName) {
-        itemNodes = emItemsElement.childNodes;
-        break;
-      }
-    }
-    if (!itemNodes)
-      return result;
-
     var itemName = prefix + "Item";
     for (var i = 0; i < itemNodes.length; ++i) {
       var blocklistElement = itemNodes.item(i);
diff --git a/toolkit/mozapps/extensions/test/xpcshell/data/test_bug619730.xml b/toolkit/mozapps/extensions/test/xpcshell/data/test_bug619730.xml
new file mode 100644
index 000000000000..f2511c0de68d
--- /dev/null
+++ b/toolkit/mozapps/extensions/test/xpcshell/data/test_bug619730.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<blocklist xmlns="http://www.mozilla.org/2006/addons-blocklist">
+  <gfxItems testattr="GFX"><gfxItem/><gfxItem/></gfxItems>
+  <testItems testattr="FOO"><testItem/><testItem/><testItem/></testItems>
+  <fooItems/>
+</blocklist>
diff --git a/toolkit/mozapps/extensions/test/xpcshell/test_bug619730.js b/toolkit/mozapps/extensions/test/xpcshell/test_bug619730.js
new file mode 100644
index 000000000000..a55735787f96
--- /dev/null
+++ b/toolkit/mozapps/extensions/test/xpcshell/test_bug619730.js
@@ -0,0 +1,53 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// Tests whether
+do_load_httpd_js();
+
+var gTestserver = null;
+
+function load_blocklist(file) {
+  Services.prefs.setCharPref("extensions.blocklist.url", "http://localhost:4444/data/" + file);
+  var blocklist = Cc["@mozilla.org/extensions/blocklist;1"].
+                  getService(Ci.nsITimerCallback);
+  blocklist.notify(null);
+}
+
+var gSawGFX = false;
+var gSawTest = false;
+
+// Performs the initial setup
+function run_test() {
+  createAppInfo("xpcshell@tests.mozilla.org", "XPCShell", "3", "8");
+  startupManager();
+
+  gTestserver = new nsHttpServer();
+  gTestserver.registerDirectory("/data/", do_get_file("data"));
+  gTestserver.start(4444);
+
+  do_test_pending();
+
+  Services.obs.addObserver(function(aSubject, aTopic, aData) {
+    do_check_true(aSubject instanceof AM_Ci.nsIDOMElement);
+    do_check_eq(aSubject.getAttribute("testattr"), "GFX");
+    do_check_eq(aSubject.childNodes.length, 2);
+    gSawGFX = true;
+  }, "blocklist-data-gfxItems", false);
+
+  Services.obs.addObserver(function(aSubject, aTopic, aData) {
+    do_check_true(aSubject instanceof AM_Ci.nsIDOMElement);
+    do_check_eq(aSubject.getAttribute("testattr"), "FOO");
+    do_check_eq(aSubject.childNodes.length, 3);
+    gSawTest = true;
+  }, "blocklist-data-testItems", false);
+
+  Services.obs.addObserver(function(aSubject, aTopic, aData) {
+    do_check_true(gSawGFX);
+    do_check_true(gSawTest);
+
+    gTestserver.stop(do_test_finished);
+  }, "blocklist-data-fooItems", false);
+
+  load_blocklist("test_bug619730.xml");
+}