Seems like I have a slightly different problem than most people with broken headset jacks. My jack works perfectly in that sound is great and when I unplug stuff, it goes right back to the Treo's speaker. Thing is, seems like no headset I plug in works for the mic part. Can the mic part of my headset jack be shot? Is there a way to check/fix?

Search turned up lots of threads about the "normal" headset jack problem.