Trying to give something back to the Community...
The MVPs have been asked to help spread the word in the community about a potential issue when it comes to upgrading a Site to ConfigMgr SP1.
As part of the upgrade process SP1 attempts to upgrade the Windows Automated Installation Kit (AIK) on the server hosting the SMS Provider to version 1.1. Now this is all fine if you don't already have a PXE Service Point in the same Site.
However, if you DO have a PXE Service Point in the same Site you could experience:
I've written the following articles on FAQShop based on the "Upgrading the Windows AIK for Configuration Manager 2007 SP1" post:
IMPORTANT: Please ensure you read this information BEFORE you apply SP1 as it is currently NOT available in the ConfigMgr Documentation Library and won't be until the R2 documentation is released.