Found it! There was an AJAX comments plugin causing the problem! I was using Ajax Comments-Reply 2.62 by zhiqiang. Disabled it and behaviour returned to normal 🙂 Thanks for your time though, pointed me in the right direction!
http://validator.w3.org/check?uri=http%3A%2F%2Fwww.fragged.nl%2F2008%2F04%2F20%2Ftest%2F&charset=%28detect+automatically%29&doctype=Inline&ss=1&group=0&verbose=1
I really don’t get all this stuff, but can i just go ahead and edit the single.php file or what? It seams to me like that file is causing some trouble since you only get the sidebar to drop in a single post view.
Tried FF3 beta 5 too, sidebar gets dropped at every post when not logged in.
Oh yeah, I was using IE7 and FF2, the sidebar seems to drop in IE7.
I’ll try and get it validated properly first (could be an issue there), then see what happens 🙂