I've noticed that my Canola performance has significantly dropped after installing a few applications and some times videos lock up (when I use MPlayer directly it doesn't have these problems), I'm not sure which application did it, but it may be related to python. I notice though that after running Canola also, that performance of my entire system is bogged down, and that python is running the background.

When I get a chance I'll have to uninstall a bunch of applications and see which one degraded Canolas performance.