(Please excuse the shoddy typing. my backup keyboard is a POS.) Last night I had to do a forced shutdown of my PowerMac, and when I booted it this morning, myLogitech wireless set was no longer recognizedby the system. So far I've rebooted (a fwe times) with the receiver plugged directly into the tower, and uninstalled / reinstalled the Logitech "control center" software. This happened before, a few months ago, but i can't remember how it got fixed. What else should I try?