Hello I recently stumble upon this Thread while having trouble with Playing 1080p mkv video on VLC version 1.0.2 on my Macbook Pro 2.6 ghz 4 gb ram 8600M GT 512mb. While looking around I found that you can change how VLC opens MKV files, in the pref>input/codecs>Demuxers>Matroska. one of the issues ...