It's a limitation/security feature of Linux. Even though Fusion will allow a mismatched uid/gid to work, Linux sees they're different and doesn't bother to try. You can override this by editing the guest[/b]'s /etc/fstab and changing the other-flags to include uid and gid arguments. If my guest[/b] uid/gid is 1000, then I might change

.host:/ /mnt/hgfs vmhgfs defaults,ttl=5 0 0[/code] to

.host:/ /mnt/hgfs vmhgfs defaults,ttl=5,uid=1000,gid=1000 0 0[/code]