Hi, I also have a really annoying problem related to the headphone jack. I have a pair of earphones (Dre Beats) which work perfectly in any device APART from my Wildfire S. When I insert the earphones I can only hear mumbled noise. They only work if I hold them in and twist them a certain way, which is quite annoying. I have tested other earphones in my Wildfire S and they seem to work perfectly and also the Beats work perfectly in any other device!
I have sent an email to HTC Support and awaiting a reply.
The HTC headpohnes are the only ones with a mic, and 2 other pairs without mics work perfectly too.
I would expect HTC wouldn't have such a stupid problem with such an expensive phone!