I've got a seiko 5 and a seiko monster. Both are great watches and they are almost identically accurate with both losing about a minute a week.
Great watches. The only time I'm not wearing one or the other these days is if I'm working.
I've been seeing all sorts of weird issues happening with Internet explorer 10. Possibly check that you haven't accidentally been upgraded by windows update?
Off topic but for information with BCUK I've found that the enter key doesn't work on the site when using IE10, but so far no other issues