A multithreaded application might crash in Windows 7 or in Windows Server 2008 R2

A new hotfix has been released today regarding an issue with applications running on Windows Server 2008 R2 (and Windows 7) that are multithreaded and use a heap.

Article ID: 2545627 - Last Review: February 15, 2012 - Revision: 1.0
A multithreaded application might crash in Windows 7 or in Windows Server 2008 R2
On a computer that is running Windows 7 or Windows Server 2008 R2, you use a multithreaded application that uses a heap. In this situation, the application might crash unexpectedly because of a race condition.
Source: http://support.microsoft.com/kb/2545627/en-us?sd=rss&spid=14134