As I was getting ready for work on Thursday morning, I got an email that websites published through Microsoft Threat Management Gateway (TMG) were unavailable. Kind of a mystery, but nothing recurring so I restarted the services and moved on.
Today, via the Microsoft TMG blog, I read that this occurred to many people the morning of June 28th. They report that rollup 2 for TMG 2010 sp2 fixes this issue.