For some time now I experience some very weird problem. When watching an mkv-file (one that is acutally playing without prior hassles, renaming to m2ts or such), usually after 30- 40 minutes playback stops and I would have to reboot the md. now it would be a little less of a problem, if I could at least fast-forward to he point where it crashed and resume watching, but that is not possible, because that crashes the player again. If I just watch the movie from the beginning after the reboot, it goes through nicely.