Yup, stuck in SP2 about 3 weeks ago. I don't usually update the time manually through the Windows Date&Time applet, but leave it to the system or use the Freesco time client to synch it to the router (which checks the time regularly) so this was the first time I'd tried it.
Got that bizarre "stratum" message (thanks for elucidating the stata ORAC).
So I guess it's an SP2 issue.
Haveta say that's the only issue (or non-issue) that I've noticed with SP2 which installed without a hiccough (from the MS CD) and doesn't seem to have broken anything in the large variety of apps that I use.