Nuts. I might have been premature in posting to Connect. I finally found another reference:
https://connect.microsoft.com/SQLServer/feedback/ViewFeedback.aspx?FeedbackID=351548&wa=wsignin1.0
I'm testing removing the certificate now.
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood"
- Theodore Roosevelt
Author of:
SQL Server Execution Plans
SQL Server Query Performance Tuning