I remember adding beta USB/mass storage drivers to my Powerbook G3 from the apple site. That is how I got the an USB 2.0 PCMIA card working. After that I never had any problems with mass storage devices. I should look for those drivers again.

I have problems with USB Overdrive. My cursus always goes to the bottom of the screen. And I can't move it up again. I had to restart without extensions on.