GTK+ Cairo
So went ahead yesterday and compiled 2.11 with jhbuild. Everything worked great (didn’t do any performance review) when opening a “normal” X session. But, when using Xnest, this is the result:

Not sure if it’s Cairo’s or GTK’s fault, or anything else’s, but it looks quite bad.
On the good news front, I have to say I didn’t feel it being much slower than 2.6. Of course, as I said, I didn’t do any performance tests, but still, doing normal desktop tasks, I didn’t see it perform too bad compared to 2.6 (which is not slow and unresponsive, despite what Eugenia might say). To show a little example, here is the color selector dialog with no Cairo:

And the one with Cairo:

Which one looks better?
June 10th, 2005 at 8:29 pm
Is there a difference…?
June 10th, 2005 at 8:32 pm
Yes, there is, look at the circle and the triangle.
June 11th, 2005 at 12:17 am
I finally found the difference! yeah, it was hard. One has a Opacity field and the other hasn’t. Did I win something?
June 11th, 2005 at 12:23 am
@Anonymous
The Opacity field is not the importent difference. To find the difference look closer to the color circle and the color triangle, they are antialias. Even on my old CRT I can see a difference.