Adsense search form? This new?

This could be old... and I've just never seen it before, but anyone seen this?

 

I get that sometimes when I preview sites locally on my machine before uploading them. It's just a Google default when it can't read the page to determine what ads to serve, just like PSAs in the regular adsense blocks.

 

It's not new, it happens with link units when it has nothing to show.

 

so whats this long unreadable line that does not even link under your comments?

 

It's a thumbnail and it is linked. Click on it.

 

Yea that has been around since the start of link units, but you don't see them as much anymore. I guess they are filling the link units better these days.