Whats your mount-options? I'm doing the same with these options:
acregmax=30,acdirmin=10,acdirmax=30,intr,noatime,rsize=8192,wsize=8192
and have no Problems ..
I've been _very_ generic:
10.1.1.15:/media/video/vdr /media/video/vdr/REMOTE nfs rw,user,sync 0 0
Thanks - will try yours....