There appears to be a problem with files that have been encoded with mp4 encoding (for example files encoded for an ipod touch). Prior to the 2.8 upgrade these files played correctly (2.6 and 2.7 code), now if you have a 16x9 file it seems to get squished in to the 4x3 space so the people in the picture and really thin and tall.
Build 1158 addressed the HLS problem, but not mp4 files as noted in this thread:
Hate to be a pain with this but given all these issues, wouldn't it be a good idea to:
1. Provide better diagnostics for the developer community (or better documentation on understanding how to use the exiting ones) in identifying the issues related to the player?
2. Provide a way to either temporarily disable automatic updates of the firmware or a mechanism to fall back to a known-to-be-good version of it?