We upgraded from 5.0.8 to 5.0.10 on Saturday, and this morning two of our users have been unable to use the web client in Firefox on their OS X (10.4) laptops. The error is "ZmZimletMgr is not defined":
Both users were running the latest Firefox (3.0.3). We tried clearing their caches, but that didn't have any effect. Only after removing Firefox and re-installing were we able to use the web client again.
Has anyone else experienced this? If so, have you found a better way to fix it than wiping out Firefox?