what happened to the linkunit?

[sallam]

I noticed today my 728x15 link unit bar is displaying many times only a search box, next to 'search ads for:' text. No more text links to click at.
what makes it do so? when I reload the page, it shows links, a minute later it goes back to search only!
Anyone else noticed that today?

[FrostyMug]

yes, on many pages the link unit and regular units cannot find relevant ads... very strange. This is on pages which worked since day 1.

[endomorph1]

Read this thread guys -

[webmasterworld.com...]

We are all having problems (although Adsense doesn't seem to think so)