Okay i've just noticed this recently, and i upgraded to snow leopard in early may ish. when i use keyboard short cuts, or turn the volume/brightness/etc up or down, it lags for a few seconds before finally doing what i've asked. i havent installed any new programs or anything, so it seems kind of random to me. any suggestions on how to fix this? its quite frustrating. even when i'm typing here it lags quite a bit.