25. July 2010
Even though it shows version 22.214.171.124 on the Microsoft download page, the July 23rd 2010 update is in fact an update from 1.0.2019.2 to build 1.0.2034
I am not able to spot the difference, and there are no updated release notes, tracking changes or bugfixes.
I started a thread on the MSDN forum to see what MS had to say about it…. Check it out here: http://social.msdn.microsoft.com/Forums/en-US/dublin/thread/f7746aa9-06d1-45a9-87e9-08850f32aab8