I'm having a similar error except I'm getting it on Firefox 2 on Linux, server is:
Release 4.5.6_GA_1044.FC4_20070706142111 FC4 FOSS edition
When I started having the problem (out of the blue, was working earlier today), after checking stuff I stopped the server and backed up /opt/zimbra and then restarted. Still same problem, https and http. Nothing in the logs. So I saw the thread about the build 1023 vs 1044 bug fixes and went ahead and applied the update. No joy.
I think I'll try reinstalling from scratch, restoring my backup, then upgrading over the top of that...I think that's the preferred method for upgrading. I'm on FC4 now, I want to update OS but maybe just one thing at a time for now. Any suggestions? I'm really stumped...
- Mick Smothers
Memphis, TN USA