The "additional information popup window" on the Contacts/Accounts/Cases modules stops working after changing themes.

Operating System : Windows 2000 Server SP4 (server) Windows XP SP3 (client)
Sugar Suite : Sugar Community Edition Version 5.1.0 (Build 4732)
Webserver : Apache 2.2.8
PHP : Version 5.2.6
MySQL : Version 5.0.51b

To recreate the problem:
1. Hover over "down triangle" on accounts/contacts/cases list. Additional details popup displays.
2. Change theme to any other theme.
3. Try 1 again. "Loading..." displays but no popup appears.
4. Change back to "Sugar" theme. Try 1 again - no popup displayed.
5. Change to any other of Accounts/Contacts/Cases and it works correctly. Change theme on new list and the popups stop working.

This happens on Firefox and Internet Explorer.

Bug report 24955 was raised on 16 September 2008.

Any advice?