And patched it sloppily at that. Theres a number of reports of problems.
For instance, a big one is realtek HD audio. Majority of people with that are likely to have problems, unless they go directly to the realtek site and update. And even sadder is the fact that MS knew about this issue ahead of time (they posted a knowledge base article on it the same day they released the patch), and still released it in that state.
I also will wait to upgrade, until I see a dx10 game come out thats SIGNIFICANTLY differant than the same game under dx9, and even then I'll install vista only on a dual boot.
That sucks about the patch messing up the Realtek driver. I once updated Realtek (non-HD) drive that came w/ my Asus motherboard via MS' site, since it said an update was available. After doing so and rebooting, no sound came on. After troubleshooting for a while, I reinstalled the audio driver that came w/ the NVidia download from Asus' support site and it restored sound. So I don't think I'll bother with getting driver updates from MS again; I'll stick to getting it directly from the manufacturer.
It's not the first time MS has released patches that it knows had flaws and it won't certainly be the last time either.