I assume this is a bug, forgive me if not. Couldn't find it mentioned anywhere else.
When visiting the forum, if there are NO currently active topics, the Active Topics Statisitcs line reads:
"There are currently 23 topicsand no active topics since you last visited."
There is simply a missing 'space' between "<% elseif not(ShowLastHere) then Response.Write "." else %>" and "and no active topics since you last visited" towards the end of line 596 on default.asp