Since the firmware update my T600 (Cingular) is behaving a little strangely. For example, I can receive IR communications but not send. When I try to send, I get the error "Could not find a receiving handheld computer". But here's the odd thing: the Treo only seems to "search" for a second or so... much less time than it would search if a PC weren't actually present. So my hypothesis is that the Treo is finding the recipient but rejecting the connection for some reason. Any suggestions?

I have the Portable KB driver but it's disabled. (In the past, as long as it was disabled I had no problems with Infrared.)