Ok, so.. I've searched, re-installed flash, rebooted, quit all other open programs, and yet Youtube (any flash based streaming video) still stinks and stutters on my unibody MBP with 4GB of ram! It plays fine for about 8 to 10 seconds, then stutters even if I allow the video to buffer all the way up. The most aggravating part of the whole thing is that I've just watched about 45 minutes worth of various videos on a relatives Acer Aspire one netbook with absolutely zero stutter/lag. Anyone else experiencing this? Any solutions? Oh.. also this happens on both safari, and firefox.