When trying out the new 'CSS changes' feature. I click the link and get a popup but nothing ever loads there.

Is this happening to anybody else or is it just me?

Nope, same here. It doesn't load for me either.

Confirmed, it doesn't load for me either.

Loads for me, but it is VERY slow, like bfarber said.

Notice my bug report though, the colors are opposite of template difference reports' colors.

where is this tool I do not even see it

Edit one of your stylesheets in the 'look and feel' part of the ACP and at the top in the yellow box thing you'll see a link for it.

I think I accidentally added things which may have been taken out on purpose by my skin's creator when I was editing mine. lol Because it wasn't stuff which isnew, i dont think. Oh well. My site seems all fine everywhere so I guess I didn't mess anything up.

Now deciding if it's worth upgrading my MAIN site to RC3. I may back it all up and try it.