Oh No. Say it ain't so! WSUS is choking on updates?!
According to Microsoft advisory 954960, Microsoft is "investigating public reports" of a problem reported with WSUS 3.0 and something stopping the deployment of updates when there are clients in the environment installed with Office 2003. Anyone know of any of these? Hah! I thought so, there are more than a few of those out there. This would have to be HUGE. I would say more customers are running Office 2003 than any other version of Office, but I don't have any official numbers to back that up. Just anecdotal bragging and a half empty can of warm beer (and a hairy gut sticking out, sorry).
From the sounds of this I would expect a rapid response from Microsoft and something to patch WSUS with (and hopefully nothing more complicated than that).