Ive tried this on three different OZ roms (3.3.5/opie, 3.5.1/opie, 3.5.1/gpe).
I assume this happens on all windows XP versions although I am using SP2 (Am I the only one? Alot of people i know have had great trouble installing it)
If you plug the zaurus in while its on, USB Networking fails and windows gives you the "USB Device Not Recognised" error, which i have _never_ seen before.
However, if you turn the zaurus off using the battery compartment slider, then turn it back on, and plug it in before it's booted, usb networking works fine. However, if you unplug it after you plugged it in and its all loaded up, the "USB Device Not Recognised" error come back.
This doesnt happen on the Sharp ROM, i havent tried anything else yet, i did a quick search and didnt find anything on the boards, has anyone else seen this before?