My forum laggs when I scroll

[Infectious]

Hey why does my forum lagg when I croll up and down?

this forum: http://atomica.omgforum.net/index.htm

this forum scrolls with no problem, just clean: http://puszyhunterz.hotgoo.net/index.htm

any suggestions what to do?

is it because it is phpbb3, and the unlaggy is phpbb2 ? ;O

reply please

[Sanket]

I don't think there is any lag.

[Infectious]

I don't think there is any lag.

Try see the difference, between puszyhunterz forum and Atomica's forum, when you scroll down and up?

EDIT: Ahh, lol its just firefox that laggs o.o Firefox 3.6

kinda rare that it only laggs on puszyhunterz's forum