laggy performance

[Urkle]

The game was really laggy for my Powerbook with Safari and a few other apps open. Quit 'em, and the game ran fine. It's strange, though, I re-launched the apps and Penumbra still runs fine.

Hmm.. It could be you had a website open that used a high amount of Javascript or a flash site.. those at times can hog a LOT of CPU. (Especially flash)