I knew I remembered reading someone posting about DST woes. I posted something on my personal blog about this today, and forgot to check your professional blog.

There's some fun for Exchange admins which requires reading and following Microsoft's documentation precisely before applying any patches, and then apply them in a very specific order... unfortunately, their documentation was released AFTER they began releasing some of the patches, so patches went out in the incorrect order, and now our wonderful organization is screwed. We'll almost certainly have some people with incorrect appointment times for a few weeks. Oh well! :-)