--- a/editor/libeditor/text/nsPlaintextDataTransfer.cpp
+++ b/editor/libeditor/text/nsPlaintextDataTransfer.cpp
@@ -425,19 +425,25 @@ NS_IMETHODIMP nsPlaintextEditor::Paste(P
     if (NS_SUCCEEDED(clipboard->GetData(trans, aSelectionType)) && IsModifiable())
     {
       // handle transferable hooks
       nsCOMPtr<nsIDOMDocument> domdoc;
       GetDocument(getter_AddRefs(domdoc));
       if (!nsEditorHookUtils::DoInsertionHook(domdoc, nsnull, trans))
         return NS_OK;
 
+      // Make sure to issue an input event for paste operations
+      NS_ASSERTION(mLastKeypressEventWasTrusted == eTriUnset, "How come our status is not clear?");
+      mLastKeypressEventWasTrusted = eTriTrue;
+
       // Beware! This may flush notifications via synchronous
       // ScrollSelectionIntoView.
       rv = InsertTextFromTransferable(trans, nsnull, nsnull, PR_TRUE);
+
+      mLastKeypressEventWasTrusted = eTriUnset;
     }
   }
 
   return rv;
 }
 
 NS_IMETHODIMP nsPlaintextEditor::PasteTransferable(nsITransferable *aTransferable)
 {

--- a/editor/libeditor/text/tests/test_bug596001.html
+++ b/editor/libeditor/text/tests/test_bug596001.html
@@ -29,17 +29,20 @@ function testTab(prefix, callback) {
   src.focus();
   src.select();
   SimpleTest.waitForClipboard("a\tb",
     function() {
       synthesizeKey("c", {accelKey: true});
     },
     function() {
       dst.focus();
+      var inputReceived = false;
+      dst.addEventListener("input", function() inputReceived = true, false);
       synthesizeKey("v", {accelKey: true});
+      ok(inputReceived, "An input event should be raised");
       is(dst.value, prefix + src.value, "The value should be pasted verbatim");
       callback();
     },
     callback
   );
 }
 
 testTab("", function() {