thats typical, as soon as I post a link to my site it starts to misbehave (to make me look stupid!)
Its a Drupal site and never had any probs till now, I've disabled some modules will see if that helps
I know what you mean, Im in Suffolk, UK (dunno if that makes a dif) and about 3.30 (when the kids get home) my internet noticeably slows down. My band width here is pretty slow at the best of times. The site was running slow tho, I've cleared the cache and run cron its a tad better but something I better keep my eye on.