Not too long ago there was an issue that caused a bunch of wizzles to dissappear and the programmers were on it bringing them back up and restoring them, but one of the articles/wizzles that was restored came back with a missing peice- the top left thumbnail option. The adsense flushes right against the left border of this article and in edit mode there is no option to see it, change it, or even that it exists.
When I published the article I got the two check marks (we found a thumbnail image is one of them) however although I did put one in originally before the problem happened, it's not there and there is no way to add or update it- I published the article and it's still not there.
Can you take a look at it and see if you can fix it Simon/Hans?
The article is called "The Dangers Of Cussing" (that's the link to it too).
here's A Screenshot: