I turned my phone on right around 7AM this morning with 100% battery. Got the notice that an update was available for the Facebook app, installed that and did nothing else with my phone. Screen off and in my pocket. Got to work, next time I turned my screen on around 8:15 I saw that my battery was already at 81%! Checked status and my up time and awake time were the same. Only change I made was the Facebook app, so went to my accounts and synch settings. There were two FB listings in there, one normal and one for Sense. The Sense one had options to change synch, the plain FB didn't have any options to change. Deleted Facebook and everything is working fine now, phones going to sleep when it should. So looks like something is messed up with the Facebook app newest update.