Microsoft seems to have pioneered a new method for service packs.  Sharepoint(MOSS) and Exchange 2007 BOTH don’t work right simply applying the service pack.  You need to uninstall, and reinstall using new media/downloads which include both the server package AND the service pack.  When applying service packs in the future, do your research and more importantly do your testing.  The workflow on our MOSS server simply stopped working upon application of SP1, and the answer from Microsoft support was to never run another service pack by itself, but rather to reinstall with the slipstreamed version.  What a pain!