alika - 2:20 pm on Feb 4, 2005 (gmt 0) My CTR is fairly stable, approximating January's levels.
If it's CTR, then it must be some on-page factors. It simply means that people are not clicking on your ads anymore. One possibility of course is that the number of clicks that G reports is erroneous, thus showing a lower number. Why not try to change something on the page first, maybe you need to change colors or users have become immune to the ads.
My CTR is fairly stable, approximating January's levels.