Actually it looks like the issue Cecilia posted on is different.  Sorry about the confusion.  You'll probably want to check it out anyway if you're seeing any client/server synchronization issues in your WSUS environment:


Just a quick heads up that it looks like Cecilia Cole from the WSUS product team posted some more information about a sync issue over on her blog.  If you ran into this problem then you'll definitely want to check this out:

J.C. Hornbeck | Manageability Knowledge Engineer