Dragging multiple items to a group library - bug report (449795480)

I created a private group library, just for testing purposes. I created a new item within the library, which worked fine. I then tried selecting all of the items (10) in a collection (in "My Library") and dragging them to the group library. I immediately received a "please restart firefox" error in the centre panel.

The error report is 449795480

After restarting firefox everthing works fine, but the items didn't make it into the group library.

System configuration:

Windows vista
Firefox 3.0.10
Zotero 2.0b3

Hope this is useful, let me know if you need further information.
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