Hate it.
When someone quotes someone, it gets cut off. It also makes you have to scroll the page horizontally on my browser.
It makes no sense. People naturally read left to right, so naturally the person's comment/reply should come first, then the username and such on the right side.
There's also an abyss of empty space. Blah. Like people said, I thought it was my computer acting funny, but no, it's ANOTHER site changing their layout.