I've been having the same problem with RAW files from my Olympus OM-D E-M1 and E-M5 not rotating on Photo Mechanic since the last update.
The problem must be in the way Photo Mechanic is ingesting RAW files from the Olympus cameras because the original RAW files direct from card are shown correctly rotated in OSX finder, whereas if I look at the files after being copied by Photo Mechanic they don't show up rotated on OSX finder..
Here's a link to download RAW and JPEG files from the two Olympus. The files that where ingested via Photo Mechanic have PM in the filename:
http://we.tl/uJsBPasAAlPS - RAW files from both my Nikon D3 and Sony RX100 are rotated properly.
FIY, I'm using a iMac with OSX 10.9.2 and Photo Mechanic Version 5.0, build 15419 (aa634dd)