OS X :: Leopard 10.5.6 Update Killed Rev 35 Drives?

Has anyone had any issue with their external Iomega Rev 35 drives not working after the 10.5.6 update? I did the update correctly and then a couple days later did my normal weekly backup across firewire to the Rev drive - done this for a year. But this time after transferring it went dumb and wouldn't eject. Here's the chain of events:

1. I successfully updated my MacBook Pro to 10.5.6 from 10.5.5.
2. Two days later I connected my firewire Rev35 to my Mac to transfer some files as I do weekly.
3. After successfully transferring the files the drive would not eject the disk using the button or the menu eject. And the drive's activity light/button was now slowly blinking.
4. Consulted the help files and they said a slow blinking light meant the drive needed to be reset, and that was accomplished by unplugging from power and plugging back in.
5. I unplugged and plugged back in using both firewire power and wall power - no change.
6. Then I pulled out my USB Rev 35 I have and plugged it into the Mac and transferred the files to a different disk.
7. After transferring the files that drive did the exact same thing.

Since these external drives appear as a CD/DVD (I think) perhaps it's a problem with ending the write session or something like that.