For those of you running Visual Studio 2005, Tuesday’s updates pushed out KB937061. If you had installed Crystal Reports as part of your install, everything was probably hunky dory. However, if you don’t have that installed, you may see a problem where Windows Update does not report the patch as being installed.
The product team is working on this from what I understand, and the workaround if you need to have it installed is to install Crystal Reports from the VS install media.
Here’s the MSDN Forums thread with the first reports and a little more information.