Has anyone had problems with keys sometimes not working? I've been having trouble with my left command key lately. Sometimes, it isn't registering as activated even if I have it pressed down. My space bar also occasionally does two spaces. :\ The double space isn't because of key repeat though. I've adjusted the delay time for key repeat to excruciatingly long, but I still get double taps sometimes. I've also already tried using canned air to push any stuck particles as suggested in the Apple Support page, but no dice. I'm wondering if mine is just an isolated issue.