After two days of use I still love this driver release. XVideo is good, and this is the first time I've gotten compiz to work, too. But in reality it is not without some minor (IMO) problems.
1) Fullscreen 3D stuff and compiz has a separation, a horizontal line around 1/4 of the way down the screen. It's just like the old diagonal line-- not a line of color but a jump between one frame of 3D and the next I suppose. Amdcccle retrace options have no effect. I see this in any GL app including fgl_glxgears. In glxgears I also still see a diagonal line...! When not in fullscreen mode, the problem becomes noticeable when the window gets bigger than about 900x900 pixels. (Glxgears is also a little "stuttery" even in small mode.)
2) returning to console mode, there is a weird screen flicker: on the right side of the screen, everything jitters a few millimeters-- e.g. it's correct one half of the cycles, wrong on the other half. It looks like a timing issue-- I can see from the console splash/background image that it's actually somehow got the resolution subtly off (parts of the image that would be 95% to the right normally are now 100% to the right, but only half the time). If that doesn't make sense, well, it is a very difficult problem to describe! There is probably a general class of return-to-console errors that I'm sure other people will report. I would call this the "After-X console jitterbug problem".
3) The diagonal tearing and blockiness are gone with xv playing-- BUT, I must add, there are still two types of flicker. One I see as a patch of horizontal lines when (for example) a character is moving around within a still frame. The other is a general "wobbliness" when the entire view changes-- e.g. when the camera is panning to the left. It's not so noticeable on the LCD but I use my laptop with a projector, too, and on the "silver screen" it can be a little unsettling... causing some headaches.
In the case of #3 I am pretty sure I'm not imagining the bugs, and they're happening on several DVDs so I don't think it's the encoding. But I'd hate to report a bug that doesn't really exist, so I'd like to know if anyone else can confirm this, or the other problems.
Anyway I'm still fairly happy... 8.3 is a huge release which removes the "un" from "unusable".
This is on: Thinkpad z61m, ATI x1400, Gentoo, kernel 2.6.24, Xorg 1.4, Mesa 7.02, 1680x1050 resolution; uvesafb+gensplash on the console in 1400x1050 (I couldn't ever get 1680x1050 to work in the framebuffer console).