I was away on a trip for ten days, so I left the fc13 test system up, running as a webcam server. It worked flawlessly, I was able to review security videos from the "motion" app and verify that no one unauthorized was in secure areas.
When I got back this morning I installed available x86_64 upgrades from the last ten days. Now USB webcams don't work (several crashes submitted via abrt), at all, meaning that I get to move the security app to another machine I was hoping to free up.
In addition the graphics (Intel based, this is not a game machine) are painfully slow, having dropped from ~1k/fps in glxgears to 60, and displays of anything graphic coming up at sand painting speed. This has to be the worst X upgrade I've ever seen, video is totally impossible, I'm estimating 30 frames per *minute* now.
I know a new release will have bugs, but I would expect the upgrades to fix bugs found, not add new ones for our amusement. FC13 looked really solid when released, I should have stopped upgrading the kernel and X while they were at the high point of their usefulness cycle.
I see all the unfixed bugs from fc11 are being marked WONTFIX, the bugs have been around since FC9 at least, no one has been assigned, and I guess nfs isn't a hot spot any more.