I installed Cyanogenmod 10.2 on my AT&T Samsung Galaxy S3 a few days ago. Twice now I've had my phone suddenly switch off, and when I turn it back on, the battery history shows an instantaneous drop of 30% or so at the point where it switched off. And I mean literally instantaneous. (I can't post screenshots as a new user, but will do so as soon as I get the rights to.) No particular app is showing up as abnormal. Anyone else had something similar happen?