I was just playing around a bit with the layout of the site, cleaning it up a bit.
It doesn't look great, but imo the site does need cleaning up atm.
http://villamunkfors.com/calcudoku.jpgAll comments near buttons and images can be shown as 'tooltip'/'mousover'.
Language bar and 'Continuous error checking' checkbox move to Settings. ('Check Now' button only there when checkbox set in settings.)
euh, and the ad can remain, not sure where to place that.