Hi, I clicked one of the adsense ads on the adsense setup panel, by mistake. That was one of ads preview unit. Should I report this to adsense or not? Please help.
You really shouldn't worry. They understand accidental clicks happen. But if you want you can contact them.
As Google says, if only a single or couple of accidental clicks has happened, it doesnt matter much to them. But to be on the safer side, you should report your accidental click to Google. There is a special form to report accidental clicks from publishers at https://www.google.com/adsense/support/bin/request.py