The VideoLAN Forums

You could go so far as to deleting your VLC preferences. You can do it through the script in the Goodies folder of the VLC dmg.

I get stuttering every few seconds while playing Blu-ray discs.

2010 Mac Pro, OS X Lion, 3.33Ghz, Radeon 5870 1GB, 24GB RAM, LG Blu-ray drive.

Analogue audio output, 5.1 channel.