I have a Droid X that won't charge under any circumstances. I've had a replacement phone sent to me and am having the same problem. I don't suspect it's the phone hardware. I have 3 different batteries, they are all dead! I have 4 different chargers and none of them will work. I re-loaded the software onto the phone from scratch wiping out everything, same problem. I reloaded my apps and still the phone won't charge. It's not the temperature of the phone. Mine runs cool. Something was done to the phone software OR an app has somehow stopped the phone from charging. Now I will be getting another phone and I have 3 dead batteries.
Verizon and Motorola need to put their heads together and find out what is going on.
One solution I may try is to root the phone, load in another boot loader and see if the phone will charge. That will eliminate any hardware issue.
This is not going to be a quick solution...... I have no juice!!!!
Dave