When holding down the stylus (long tap) on the battery applet to change to the percentage icon, the view does change but the entire desktop freezes and the entire Zaurus is unusable.
I was able to log in over the USB connection after this and restart Opie. Logging in over the wireless link didn't work, the session hung after a few seconds, and further login attempts also hung. The wireless link was pingable... until I removed the card and plugged in back in. Then, no wireless connectivity at all, it seems.
This bug is duplicable: it happens every time I try it.