We're having problems with Firefox (3.6).
When de FF-profile is redirected to an OES-Linux Storage, FF is starting up, and it's loading the prefs.js file, but browsing or searching isn't possible. Nothing happens if you type an url or do a search.
If the FF-profile is on a Netware Storage there's no problem at all.

We're in the middle of a process to migrate from Netware to Linux.