Curiously, my old DVD folders are playing but my recent ones are not.
Few pointers:
A - I have the .179 version
B - Log says :
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0004250: 2904: Playback: DShowVideoGraph::Render: Start
0004250: 2904: Playback: DShowVideoGraph::ConnectSourceAndSplitter: Start
0004266: 2904: Playback: DShowVideoGraph::ConnectSourceAndSplitter: Failed to open or parse file. (hr=0x80004005)
0004266: 2904: Playback: DShowVideoGraph::ConnectSourceAndSplitter: Finish (16 ms)
0004266: 2904: Playback: DShowVideoGraph::Render: Error: source / splitter did not expose output pins.
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C - Doesn't matter Red October or Merit. (Merit gives a slightly different error)
D - When I drop an old folder in "Playing now" I get a filetype: ifo, when I drop a new folder, I get filetype: dvd
E - Works on MPC - HC
Issue has been going on for a few weeks now. I though my rips were not good, but reripping them didn't help.