We haven’t seen this one ourselves but thought it may crop up :
http://support.microsoft.com/kb/937625 – Error message when you use Outlook to open an e-mail message that contains a PDF attachment from an external mail system: “There was an error opening this document. The file is damaged and could not be repaired”
http://support.microsoft.com/kb/937028 – The Microsoft Firewall service does not start after an ISA Server 2004 SP3 installation fails
We reckon that you should keep an eye because they seem very likley to happen.
CIAOPS 