The VideoLAN Forums

or you can enable 'one instance' mode, and that way when you open a file it'll be added to the playlist of the first instance of vlc.

I found higher bitrate H.264 videos which still won't run on with Q6600 CPU.

Well seems like no more security update for quicktime for me,thank you...
BTW I beleave the problem described in this thread seems to occur on OS X 10.3.9 only.