Thanks for the reply - and yes, seems like a similar occurance. Y'know what? It may just be what you said, something to do with one of the codecs. Currently I do suspect this to be the case as other MKV movies of similar, even larger bitrates, perform flawlessly. This particular movie happens to be the DTS-ES audio codec (which from memory, I don't believe I've obtained movies previously with the "ES" extension).
I would expect that if the TV in fact did NOT support this codec, that a simple warning message would just appear indicating that! I remember on my last tv, a 2011 Samsung LCD - LN46D630, whenever a codec (either video or audio) was not supported, it simply popped up an error message indicating that "the audio codec is not supported" but the movie would continue to play normally (well, normally minus the audio portion for example).
I'm not overly concerned about this, as the tv seems to be very robust thus far (having owned it for just over a month) - it does everything that I could possibly hope it to do! I have already cross-referenced this via this AVSForums message board and contacting Samsung support. Samsung's support indicated that this "problem" movie file I'm speaking about probably has technical specifications outside what my PN60E6500 can handle (either codec support, bitrate, resolution or FPS).
On the only other file which I ever had an issue with on this particular tv, the TV simply ceased to play that file from the get-go and resulted in a reboot - different symptom all together. This other file did NOT have the DTS ES audio codec but displayed a different problem as I just mentioned.
Have you had any issues or experience in DTS-ES audio based files? Would a tv that can decode DTS core be able to decode DTS ES?