Earlier this month Microsoft released the first Exchange Server 2007 SP1 Rollup, which contains at least 32 post-SP1 updates and fixes! (Good to see these issues being fixed)
The KB article is here http://support.microsoft.com/?kbid=945684 with the download links etc. although it's available on Windows Update too
Note: you should only apply this rollup to Exchange 2007 environments with SP1 already installed. if you don't have SP1 then... you need it
