My migration to Vista was very difficult. I have found a lot of problems that was absent in Windows XP. More than I was in one step from refusing this OS and returning back to XP!
However I finally found the way how to compel it work for me:
1. This is a link to the web page with the necessary tweaks that you need to apply after Vista installing:
WWW Link.
2. Then I have bought and installed TuneUp Utilities 2008 that I use together with Stardock Tweak Vista to adjust my PC:
WWW Link.
3. And at last I have installed Vista SP1 RTM:
WWW Link.
The results: Vista works very quickly and correctly now as well as all installed Strdock programs. And I already love this OS.