If you visited any Google AdWords help forum in the past day or so, you would have seen dozens of complaints in the form of threads and posts from advertisers worried about their quality score. As you know, quality score is a major factor in determining the AdWords ad rank and price.

Google confirmed the bug in a couple threads, including one at the Google AdWords Help forum and one at WebmasterWorld. Google said it is just a reporting glitch and ad serving, I assume pricing and placement, have not been impacting by the reporting glitch.

The confirmation comes in two parts.

AdWordsPro said:

The key word above was “appears,” where program manager of AdWords, Adam, confirmed later on saying:

Things should be getting back to normal and you should not have been impacted, unless you made changes to your campaigns based on the reporting glitch. If so, put things back.

Forum discussion at he Google AdWords Help and WebmasterWorld.