Safari won't stop
Let's say I go to YouTube and start watching a video there. After 5 seconds, I decide not to watch the whole thing, and I close that Safari window. However, I can see (via Little Snitch which shows the current network activity) that even with the youtube window gone, the download continues in the background.
This obviously slows down any subsequent browsing as long as the movie is being "watched" or downloaded, to who knows where?
I'd say this is a bug in Safari - I'm currently using v5.0.3 in OS 10.6.6
The only way to stop the unwanted activity seems to be to quit Safari and restart.
Hopefully this can be fixed in a future version. I have submitted this to Safari feedback.
Maybe other users can confirm this.....
Mac Pro 8 x 2.8 GHz, Mac OS X (10.6.6)