I also have this problem, using a Sweex PCI firewire adapter and a Maxtor 300 GB drive. It works perfectly with USB2. My firewire HD worked properly with Ubuntu 5.10, but not with 6.06.
-- Firewire connection not being correctly mounted in 6.06 https://launchpad.net/bugs/53746 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs