I'm excited by the new features of Safari (both those in the beta and the announced ones). But they did one major mistake.

Now when you have to close a multitab window it ask you if you are really sure of that. Does it do any good? How often do you mistakenly close a window you didn't want to? And what's the cost of closing a webpage by mistake? Usually not high. This is even more annoying that the same happens when you try to *quit* Safari. Now if you press cmd-Q or go to Safari->Quit chances are that you just want to quit, why do you have to click again?

Also, soon enough clicking OK will become automatic, that probably the one time out of a million that you actually didn't want to close the window, you will click OK anyway and just after say "ouch!".

Me and my girlfriend were extremely annoyed by this behaviour and her comment was "is this becoming Windows?"

If anybody is annoyed by this "feature" please send your feedback to Apple. I'm sure is very important to them especially in this stage.