Update: Mark offers this clarification of our original post. This modified extension needs to be deleted, or the release version of IE will crash on any page that calls the QT plugin.' It involved duplicating the plugin from OmniWeb and changing some of the bundle properties. Previous QuickTime plugin fix needs to be removed first Mark Garrett writes: ' Previously a fix was posted to allow the QuickTime plugin to work with the IE preview release. These are preliminary and in some cases remain unconfirmed: Here is a look at our initial reports on Mac OS X 10.1 related problems.