mimmo - 9:11 am on Feb 13, 2007 (gmt 0)
I do not believe this "landing-page-relevancy-thing" ...
It would be too simple to just add whatever keyword you are bidding on to the landing page and fool the Adwords bots.
I also saw advertisers on top positions with landing pages that does not contain the keyword at all. But maybe the keyword is related.
So I suspect it must be something else. Manual review?