I recently placed an Adsense link unit under the URL bar on my proxies(e.g. math-read.com). It was working quite well but now it just says "View ads about" and then has a input box and submit button.

Why does this happen?

thats totally wierd, how bout if you put before the url bar? is it display ok?

I don't see why that would make a difference because sometimes it does show links.