FUSE module in official kernels (>= 2.6.14) don't support NFS
exporting.  In this case if you need NFS exporting capability, use the
'--enable-kernel-module' configure option to compile the module from
this package.  And make sure, that the FUSE is not compiled into the
kernel (CONFIG_FUSE_FS must be 'm' or 'n').

You need to add an fsid=NNN option to /etc/exports to make exporting a
FUSE directory work.

You may get ESTALE (Stale NFS file handle) errors with this.  This is
because the current FUSE kernel API and the userspace library cannot
handle a situation where the kernel forgets about an inode which is
still referenced by the remote NFS client.  This problem will be
addressed in a later version.

In the future it planned that NFS exporting will be done solely in
userspace.