One of the most immediate of many problems is that the Treo hybrid headset cuts in and out. It seems not to be able to make up its mind if there is a headset plugged in. The speaker phone icon flickers on and off and the conversation over the headset also cuts in and out.

Has anyone else experienced this problem?

I am making a wild guess but since it currently doesn't happen all the time, it may be linked to signal strength.