What version of fuse are you running? I have found a number of heisenbug
issues arising from using mismatched fuse versions, and installing
glusterfs patched fuse (2.7.4glfs11 last time I checked) made most of those
problems go away.
I think it's the unpatched 2.7.4. I'll try to get the patched 2.7.4 onto it, but I had problems compiling it earlier today - didn't have much time looking at it (this is on Debian Lenny btw.).
Regards,
Vidar