Trouble playing back certain .mt2s files

I have several movies (mostly Blu Ray rips in .mt2s container) saved to the internal HD on my WD TV Live Hub.  However, many of them play back distorted and pixelated.  The video will play fine for a few seconds, but then incur the same problems I just described.

Two Questions.

First, why is this only happening with this file type and why is it only some of them? Second, has anybody else had this problem, and if so do you know how to fix it?

I imagine it is some kind of encoding/decoding issue but I don’t want to get into all of that unless I have to.  Any help is very much appreciated. 

I am up to date on the latest firmware version.

Typo: .m2ts…but I’m sure you know what I meant.