Is it the CMOS battery? I have vague recollections that a failing CMOS battery might do that.

System is fairly new (no more than 2 years old) but I should check it.

Looking at this gravity map, there does seem to be a slight dip across northern England. Could be the source of your problems?

I read somewhere that CMOS batteries are particularly prone to neutron start explosions. Viz, I think it was.

Huh, I was going to ask if network time was being blocked in your router, but then I saw you said you can manually make it sync.

So I dunno, I'd go with Koss on this one!

Just had to resync manually again. About a minute out.

I've been having clock problems with xp not syncing with the default (MS?) internet time server. I set it to the other server and at least it got the time right. I dunno if it'll hold or not.

So it's been happening continuously since I posted last but last night I changed the server to the MS/Windows one and this morning it was about 2 1/2 hours out. But not exactly so it wouldn't be a time zone issue.

Resynced it, totally odd.