I have used 3 iMac's/Macbooks and continue to have this issue. I even had a 27" i7 with 8 gb/ram. Every time I would click or do something while a video was streaming (on Hulu for example) I would get a slight stutter in the video. I have all updates installed. I know many of you use Mac Mini's to stream media to your televisions. I don't understand why I've experienced these problems with three different computers. I suppose it may be a Flash problem? Just looking for tips. I noticed it again today when I tried to stream something on CNN. I tried to click on something in my email...slight stutter...click on a web link...slight stutter...etc etc.