It feels like a premature launch. When I got this from chrome-unstable a couple of weeks ago, it was a shock. Many styling problems, and widgets not working as expected. Some of the stuff that didn't work was pretty niche (e.g. horizontal scroll-wheels), so it's understandable nobody noticed it. But there's even stuff like central UI elements (tabs, the URL box) being rendered in some big, ugly and badly hinted font instead of the system font. Menu items having just insane amounts of whitespace, etc.

There might be good technical reasons for the change, but on a UX level it feels unfortunate :-( I still remember how nice it felt to switch from Firefox to the initial Chrome Linux alphas. It might have been missing major functionality, but at least it looked and worked the way I expected a Linux desktop app to work instead of having the UI be just a little bit off in a dozen places. I'm sure they'll get it to a 99% state soon enough, but getting that last 1% looks like it could be a challenge.