Microsoft released two patches this week. One for Windows XP users and the other for Windows Server 2008 users.
The first resolves an issue with Double Bite Character Strings (DBCS). According to the author of the article at Ars Technica, if a user has a non-English version of Microsoft Input Method Editor installed, the users are limited to only inputting English characters. There are five scenarios where this problem occurs.
The Server 2008 patch resolves an issue which stops a user from starting or connecting to Virtual Machines due to expired certificate.
Source: Ars Technica