Description of problem:
Created a distributed replicate volume with stat-prefetch enabled & did glusterfs untar from one client & rm -rf from another. 
rm started failing stale nfs file handle errors.

After disabling stat-prefetch, these errors, did not come.

client log:
[2012-01-06 13:11:27.892716] W [client3_1-fops.c:2249:client3_1_lookup_cbk] 4-vol-client-2: remote operation failed: Stale NFS file handle. Path: /glusterfs-
3.3.0qa18/xlators/cluster/afr/src/afr-mem-types.h
[2012-01-06 13:11:27.892787] W [client3_1-fops.c:2249:client3_1_lookup_cbk] 4-vol-client-3: remote operation failed: Stale NFS file handle. Path: /glusterfs-
3.3.0qa18/xlators/cluster/afr/src/afr-mem-types.h
[2012-01-06 13:11:27.892815] W [stat-prefetch.c:2614:sp_unlink_helper] 4-vol-stat-prefetch: lookup-behind has failed for path (/glusterfs-3.3.0qa18/xlators/c
luster/afr/src/afr-mem-types.h)(Stale NFS file handle), unwinding unlink call waiting on it
[2012-01-06 13:11:27.892834] W [fuse-bridge.c:1050:fuse_unlink_cbk] 0-glusterfs-fuse: 4754388: UNLINK() /glusterfs-3.3.0qa18/xlators/cluster/afr/src/afr-mem-
types.h => -1 (Stale NFS file handle)
[2012-01-06 13:11:27.919645] W [client3_1-fops.c:2249:client3_1_lookup_cbk] 4-vol-client-4: remote operation failed: Stale NFS file handle. Path: /glusterfs-
3.3.0qa18/xlators/cluster/afr/src/afr-self-heal-common.c
[2012-01-06 13:11:27.919721] W [client3_1-fops.c:2249:client3_1_lookup_cbk] 4-vol-client-5: remote operation failed: Stale NFS file handle. Path: /glusterfs-
3.3.0qa18/xlators/cluster/afr/src/afr-self-heal-common.c
[2012-01-06 13:11:27.919751] W [stat-prefetch.c:2614:sp_unlink_helper] 4-vol-stat-prefetch: lookup-behind has failed for path (/glusterfs-3.3.0qa18/xlators/c
luster/afr/src/afr-self-heal-common.c)(Stale NFS file handle), unwinding unlink call waiting on it
[2012-01-06 13:11:27.941187] W [fuse-bridge.c:1050:fuse_unlink_cbk] 0-glusterfs-fuse: 4754424: UNLINK() /glusterfs-3.3.0qa18/xlators/cluster/afr/src/afr-self
-heal-common.c => -1 (Stale NFS file handle)

Steps to Reproduce:
1.while [ 1 ]; do tar -xvf glusterfs-3.3.0qa18.tar.gz ; echo 3 > /proc/sys/vm/drop_caches ; sleep 5; done from one client
2. rm -rf glusterfs-3.3.0qa18/* from another client
  
Actual results:
rm: cannot remove `glusterfs-3.3.0qa18/xlators/cluster/afr/src/afr-self-heal-algorithm.c': Stale NFS file handle
rm: cannot remove `glusterfs-3.3.0qa18/xlators/cluster/afr/src/afr-self-heal-common.h': Stale NFS file handle
rm: cannot remove `glusterfs-3.3.0qa18/xlators/cluster/afr/src/afr-mem-types.h': Stale NFS file handle
rm: cannot remove `glusterfs-3.3.0qa18/xlators/cluster/afr/src/afr-self-heal-common.c': Stale NFS file handle
rm: cannot remove `glusterfs-3.3.0qa18/xlators/cluster/dht/src/Makefile.am': Stale NFS file handle
rm: cannot remove `glusterfs-3.3.0qa18/xlators/cluster/dht/src/Makefile.in': Stale NFS file handle
rm: cannot remove `glusterfs-3.3.0qa18/xlators/cluster/dht/src/switch.c': Stale NFS file handle
rm: cannot remove `glusterfs-3.3.0qa18/xlators/cluster/Makefile.in': Stale NFS file handle

Expected results:
root@Dagobah:~/mount# rm -rf glusterfs-3.3.0qa18/*
rm: cannot remove `glusterfs-3.3.0qa18/libglusterfs/src': Directory not empty
rm: cannot remove `glusterfs-3.3.0qa18/xlators/cluster/afr/src': Directory not empty