I upgraded to the new version late last week when it came out and over the weekend I ended up giving up in frustration and reverting back to 2.3.2.0.

Main issue was with MKVs that played fine in 2.3.2.0 and didn't require transcoding (ie. they played natively on the tv), all started to transcode. Turning off transcoding meant the tv then told me it was an unsupported file format, so it must be delivering something wrong. I played around with the SamsungLA.prf file (mime type) with no success. I also have a Samsung Bluray player and it behaves in the same way with 2.4.0.0. (ie. it tries to transcode files that played without transocding in 2.3.2.0 and turn transcoding off it tells me unsupported file format).

I have now reverted back to 2.3.2.0 and the world is good again. I can set transcoding on and the MKV files I test under 2.4.0.0 that were transcoding play fine without transcoding in 2.3.2.0 and if I turn transcoding off they still play fine.

Thanks,
Rob