Ok, ok, you are right. you are not complaining. But I still say you should worry about raising your CTR and its pretty good.
A few things you could play around with are: 1) The ad block placement location. I have more luck with floating them to the right / left of content. 2) The ad block colors, I have heard 2 different takes on this. Some swear by making the ads blend with the colors of your template. On the opposite, I have also heard that you should make your ads colors standout. 3) You can use different ad block sizes. Adsense offers you heat map examples on the site. They also offer a lot of pointers. The best thing I would suggest is to read up on it and than test, test, test.
It is really high rate keywords with nearly 1$ for 1 click but with 1800 impression just got you 43 clicks, maybe you should put ads to another places like under title or header banner. Try it. Good luck.
here is the way to increase your CTR http://www.google.com/adsense/support/bin/static.py?hl=en&page=guide.cs&guide=29994&topic=29995
For increasing CTR you need to take care of ad placement. Try to put ads at the bottom of the post, this is the place where visitors decide to take action.