We're currently having about 41 visitors and 5 members online, and we've had equally high (and higher) numbers in the past. But on the bottom of the Message Board index, it still says
[quote:8057318a68]Most Terry Pratchett fans ever online was 28 on Fri Aug 19, 2005 7:57 am[/quote:8057318a68]

Is that perhaps because only registered members are being counted?

It must be, that record was on the first day of the move too!

Also, is it the same counter on the home page (and games, articles, etc.) as on the message board ? I often see a difference when there are several members online on the homepage and when I get to the boards there are less...

The counter on the homepage pertains to people on the entire site; the one on the message board only counts people on the message board section.