tedster - 7:02 pm on Jun 13, 2010 (gmt 0)
A note about "quality" - it almost certainly is not what a human being would intuitively call quality. It's an algorithmic something or other, apparently a site-wide factor, and as we're seeing this algorithm is sometimes a fail.
A friend tells me that the error pages he's seeing in the SERPs are not soft errors - they are returning the proper status codes in the HTTP header. And what's even crazier, these pages are making it into the Google cache: