Hey Bippy, I have just checked chrome, the latest version, and I don't get what you get at all, all I get is 1 advert right at the bottom within a thread, and 1 advert right at the top on the index page only, which is the same as FF.
I even went to the trouble of finding the exact thread in your screenshot just for comparison.
Something weird is going on with your chrome, you must have enabled the spam me shit loads of adverts extension
Seriously though, disable any extensions and restart chrome, if the problem disappears, then you'll be able to home in on which extension is the culprit, or better still, use FF. I had some trouble with chrome a while ago so I reverted back to FF and I'm a much happier person because of it