I have just discovered that the 'Reuse Color Scheme" option that used to be available when setting up Ad Links has mysteriously disappeared.
Now, the ads screen shown by G when somebody clicks on any ad link on your site takes your background color from the ad link block and shows ads with the default blue link color.
That is all fine and dandy if you are using the right background color on your site, However, if like me you are using perhaps a dark blue background with white text, the resulting ad screen served by G is virtually impossible to read (blue text on dark blue background doesn't show very well).
I only found this out by chance when trying to figure why I was getting a lot of click thru's on our various ad links and yet folks were bouncing straight back to our sites.
Most of our ad links were set up some time ago when the option to reuse the color scheme was available but somewhere along the line, that option has been removed and the resulting ad screen has reverted to bulk standard blue links on whatever background color the ad link block uses.
Now I wonder how much I have lost through visitors not being able to read the ads when they click thru. It would have also been nice if Adsense could have told us when they made this change, whenever that was.