dawjbns, don't scare me like that! I thought that I had deleted it. This happens for the numerous time and I guess it has something to do with starting a reply, but not actually finish it. I am 100% sure that I was about to write, but then I changed my mind and just closed the browser. *THINKS* no idea...
The reason the forum looks like that is because the three new buttons are not in a <div>, but float: left;-ed list items (<li>

. I guess that Chrome renders <ul><li> just like a <div> (but it shouldn't, because they are not the same). If the buttons were float: left;-ed <div>, the next <div> (with the forum-page) should start from the right of it (just like you see it).
(unless the forum-page is moved down or if there is a <div> that clears the float).
.......
I guess I went too far with explanations. Basically if you have a <ul> or <ol> the <div> after that should start below it (and most of the browsers do this), but Chrome renders <ul> as <div> and you see the pretty result from this.