CC2014 causes footage to export sideways using AME??

Recently, as in since the 2014 update, about 8 out of 10 times I export footage using Media Encoder, it exports footage sideways (as in the left-right is flipped to bottom-top). On top of that, sometimes the footage isn't all exported sideways. Sometimes it's just the b-roll, or the footage is exported sideways but the subtitles aren't. What the heck is going on???