Bad time sync with 2.4.19 on a Dell Inspiron

I've recently noticed that the time on my newish Dell Inspiron 8100 drifts about 30 minutes behind real time in 24 hours.

It's got an Intel Mobile P3 1.13ghz CPU with SpeedStep, and I thought that might be the case, but I've got it set to run full-speed when plugged in, and it's been plugged in the whole time.

I'm seeing this with 2.4.18 & 2.4.19. Can anyone verify this? I've poked around with Google, and haven't seen any other complaints.

Please make sure I get CC'd on replies, since I'm not on the list.

Komm auf meine Sonnenbarke!