With the included HTC adapter at my home, however (and with a Motorola adapter left over from a previous phone), the Rezound will charge with screen off, and perhaps even a little with the screen on. Allowed to charge overnight, I do not have to turn the device off when using the HTC charger. On this charger, the phone indicates AC power.
Of course, none of this was an issue before I took the ICS leak. Even though I've gone back to GB, I still have the ICS firmware, and I suspect something different in there is affecting charging.
In fact, I wouldn't be surprised if HTC simply lowered charging rates as part of a campaign to deal with widespread heat issues. If you were trying to cool the phone, that's definitely something you would consider tweaking.