I have a few users sharing a file. This is what I get from the users so
far. User A opens the file, and is working on it. Its an Excell
spreadsheet. User B attempts to open the file, and gets a message that the
file is locked by user C. User C hasnt opend the file at all.

Server is nw 6.5 sp6 clients have 4.9.1 sp4 I believe.
I do have these settings

SET CLIENT FILE CACHING ENABLED = OFF
SET Level 2 OpLocks Enabled = off

Any idea where to start looking? Iv ran DS-repair, and I am currently
purging the volume just for grins.