Individual tab closing 'x's.
I saw a link on how to remove them, but haven't gotten around to it yet. It's been stable in Gentoo for a while now but just didn't feel like compiling it that day.
So, nothing wrong with 2.0.0.1 AFAIK. Now that you mention it though, I have been getting more window injections lately in 1.5.0.9. It might be time to try.
