After downloading the latest VLC for MacOSX (0.9.9a) when my Mini comes out of hibernation, the audio from VLC can be heard, but the picture can't be seen. Mostly there is a black screen except for where the desktop shows around the outer edges. Killing and restarting is perfectly normal.
My prior version behaved as normal after hibernation, but I don't recall its version.
I believe my Mac OS is up-to-date as of this time, but it's not near me to check right now.