bluemamba - 8:24 am on Oct 27, 2010 (gmt 0)
Altho I am an affiliate marketer I run only very high quality campaigns with tons of unique content. I've noticed the same thing overnight. Every single campaign slapped across the board from Q.S. 7-10 to 3-4. No Poor landing page or irrelevant URL warnings just a blanket downgrading of QS. Have logged a query with Adwords support. I'm hoping like hell it's a bug.