So far the only issue I am experiencing is the icons inside folders for some apps appear like a generic Android logo, same issue others have mentioned above. I tried replacing them, even saving the scene again, but after reboot they are gone again. The apps work if you launch them, it's just the icons inside folders that you have created.
Other than that, very noticeable improvements in overall speed, responsiveness, smoothness, and battery life. Great update except for the icons issue. Fewer apps appear to be running now per the Running Services monitor, which is great.
Has anyone noticed the contents of websites on the stock browser appear a little smaller, as if they are now slightly zoomed out? I noticed it first on picasa web, which used to fill the screen, also m.facebook.com. It's not the text size or zoom, I didn't change any of those.