Computer Clock oddity
I update my clock via the Cambridge server most days, partly because I'm that sort of pedant, partly because I like it to be right for auction bidding.
Until recently, it stayed accurate to within 2-3 seconds over 24hrs but lately it has regularly been out by about 30 secs. over the same period. Backup battery was my immediate thought, but it GAINS that 30 secs.!
Any thoughts?