We found difficulties regarding opportunistic locking in the folloing environment:

Server: SLES10sp3 and OES2sp3. File system NSS. Client: Win XP, client 4.91 sp5. Office version: MS Office XP
This shows certainly when saving an existing word document after editing. Word hangs, and sometimes even the computer freezes.

Fix: 1): OPLOCK support has to be disabled (level 0) or... 2): Turn off file caching in the client settings.

Anobody that has other experiences or fixed it in another way? Pity to have to disable a performance feature like this, or maybe it is of less impact?