I'm using the Firefox 2.0 RC2 hourly build 2006100412 along with the NoScript extension. When viewing the new IPB 2.2.0 beta 2 forum with JS enabled I get 404 Not Found errors if I do the following

1) Click on either the "Forum Options" or "Options" drop-down button (below the "New Topic" button) to bring up the drop-down menu.
2) Move the mouse cursor

** New window/tab opens with the following error

Not Found

The requested URL /[object HTMLDivElement]was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Apache/1.3.36 Server at www.forums.invisionboard.com Port 80

No error occurs when JS is disabled.

No error occurs with IPB 2.1.7 with JS enabled, so I assume this is a new bug with IPB 2.2.0 beta 2.

I've just noticed that the topic title has been truncated (ie. the last word should be "enabled") despite the fact that it was allowed when I originally created it. Is this also a bug or a feature ?

The 404 error also occurs with the Search drop-down at the top-right of the window (ie. to left of Help button on the top menu). It seems to occur with any drop-down.