@Rodski and @davidstoll, do you get something like this from lsusb:
It's the "ID 05e3:0701" that's important. This is still working for me in a fully-upgraded Natty system, but a fresh install, not upgraded from Maverick. If you have the device 05e3:0701 and it's not working properly in Natty upgraded from Maverick, that's an important observation, but if you don't have that device, please say so. Discussion of optical drive enclosures other than those with the ID 05e3:0701 confuses this thread.
Bus 001 Device 004: ID 05e3:0701 Genesys Logic, Inc. USB 2.0 IDE Adapter