I have recently used the Aria during a weekend at a town Maryland, which is about 90 miles from here (southeast Pennsylvania). Same issue.
Regarding chargers, I use a stock HTC charger at home and a cheap car charger. I had been using these chargers for more that a year before the problem started. And I use them for other devices, such as my wife's iPhone, with no problem.
I sent the Aria back to HTC today for a 2nd try. If anyone wants to experiment, I will ship you my other Aria. Of course I would like it back. I am sure HTC will figure it out someday. And my other Aria is still under warranty too. I am just letting HTC work on one at a time.