Under IE7 I get "Done, but with errors on the page" in the status bar.
The error info is
Line: 8
Char: 9
Error: Expected '('
Code: 0
URL: http://domain.com/?_task=mail
Same error exists for more or less all URLs. Doesn't seem to actually break any functionality, but should be cleaned up.
Any ideas on this? I need to get this fixed but can't track down it's source.