When using the GreenTrack theme, I faced a small issue with Google Ads.

Those ads flickers for a short moment, when moving the mouse over the sidebar links.

I searched the internet and found a solution to that, atleast for GreenTrack users.

Just add border:none to #sidebar li a:hover in the stylesheet.

Thats it.

I found this solution at http://www.webmasterworld.com/forum83/5741.htm

Hope that helps some of you.

Thanks.