Searched high and low for this. And I finally found it!
This is the exact problem I am having except it doesn't seem to be confined to ROM. Also, USB still works properly. The problem is the phone keeps thinking it's connecting / disconnecting to USB all day long and for some reason this kills the battery life. It also makes it impossible to see notifications in the bar without sliding it down (the bar is constantly flashing USB connected).
I had this problem on SRF1.2 (EC05) and ODIN'd to EH17 last night... there's no way the problem could carry over if it was a software issue right? Well, the USB was connecting/disconnecting as soon as EH17 booted.
Any insight into what is causing this? I'm starting to think my only option is to ODIN back to stock and bring it in to a Sprint store...
UPDATE: It seems the problem has 'stabilized' a bit... the USB connection is now ALWAYS considered to be on and no longer flashes connect/disconnect over and over. Maybe I just need to clean out the USB contacts?