I cannot get MKV's to play either. They show up on the list of files, but it just says not supported and it skips to the next file. It does play my Apple TV encoded movies just fine, just not the mkvs.
I also had issues with the Princess and the Frog Bluray disc. At the menu screen after selecting play, it asks for two options (don't remember what they were) but I selected the normal play option (this is part of the disc not the player), it just started on a loop with distorted audio. I power cycled the player and this fixed the issue. I, however, did not play the entire movie, but rather just the first 10 minutes or so of it in order to evaluate and test the player. As I posted on another thread, I'm having issues playing through the entire MVA 3d Bluray, it will not play the entire movie, it just stops after about 34 minutes into it. It goes back to the DVD Players main menu (where you select what media type you want to view). And the Stop "button" on the player keeps blinking, even after you hit play on the remote and the movie re-starts again from the beginning. I watched MVA last night (or tried to) and had this issue happen 4 times during the movie. I'm on firmware 1008.0. I got a hold of firmware 1005.0 today, I'm going to try and downgrade the firmware to see if it's a firmware issue. Has anybody ever downgraded firmware on a Sammy BD Player? Is it safe to do so? Before I do the downgrade I'm going to try a regular BD movie to see if it just a MVA issue with my player. I have not heard anybody else with this issue and the ones on display at BBuy don't seem to have this issue, but then again I don't know what firmware version they have.
Mkv's play if sourced from the USB port, but they will not work over the network. Wish samsung would just support SMB shares.