I've customized my backtrack 4 installing some additional tools I needed, and wanted to create a live persistant USB disk using linux live scripts. I've already done this with beta version and it worked fine. But with the final release i'm stuck during the boot with this error :
* setup union directory (using aufs)
mount: mounting aufs on union failed: No such device
aufs : unknown symbol exportfs_encode_fh
FATAL error occured - can't setup union (aufs)
* Something went wrong and we can't continue. This should never happen.

I googled the error, and it seems to be recurrent but i couldn't find any solution!

Any tip that could help me??