Me too, I just get a huge white block on the right hand side of the page. Impossible to use or navigate, I've had to use IE to write this, this happens with or without the Opera pop-up stopper. (Opera 7.10)
I've found everything extraordinarily slow this afternoon. It's been going at about one tenth of an acceptable speed.
Perhaps it's something to do with the new "feature" of the forum (see at the top) viz: "PC Advisor now highlights keywords selected by our advertisers, typically a vendor name, product or service. Keywords are underlined in green and are hyper-linked to the advertiser's site."
Could not log on this afternoon at about 4.0pm very slow loading then crashed out. Got on site now with Opera now, but the dropdown menu at the bottom of the page won't work. Change to IE6 and everything works fine.