I'm having a few issues with VLC on my late 2013 15" rMBP. It just doesn't seem to be very stable. Often I will open up a video file and it will become unresponsive for about 30 seconds to a minute. The audio will play but the video will either freeze on the first frame or not display it at all. At this point I can either wait for a minute or I can force close. It will normally be ok if I re open but not always. Last night it crashed mavericks completely (Kernal panic, I think, grey screen telling me I have to reset). Also, when watching something through the HDMI lead there is always a grey bar present at the top (where the menu bar would be). On a kind of unrelated note, how do I set OSX to open files with whatever program I want? I right click, open other. tick the "always use this application" but that only seems to apply to that one particular file, not all files with the extension ".mp4" (for example).