Talk about good timing. I just reinstalled Vista and Microsoft was kind enough to release to major updates that are believed to be part of the rumored SP1 update for Vista. The first is a performance and reliability update and the other is a compatability and reliability update. Currently these are only available as stand-alone updates, but they’re expected to hit Windows Update within a week or so.
I’ve not been using Vista long enough to know if any of the issues addressed by these patches have been affecting me, but I applied them anyway so I won’t have to find out. If you’re running Vista and have been having any issues with memory leaks or some games not running then you may want to try applying these updates.