Very strange. My Keywords have always been a QS 8 and above. I added one article to my landing page tonight then added the BROAD and PHASE keyword to the campaign. The Exact was already there. It stabilized at a QS of 7 for a few hours. Around midnight i noticed that ALL KEYWORDS for every campaign are now all QS 5. How is that possible? Is this another QS bug because adwords had a nasty QS bug in their code last year (2010) at around the same time of the year that they admitted to. Strange that my QS should drop 4 points in hours.