MFC80.DLL errors when using a mission

I ran into this problem yesterday, not having flown missions for a while which had me perplexed. FSX crashed when I selected the mission button, and gave me a cryptic error message indicating "a problem occured with MFC80.DLL". The problem was that a few weeks ago, I re-installed an application that apparently broke the C runtime libraries used by FSX, but only when attempting to load a mission.The solution and symptoms are covered here in a hot fix by Microsoft:http://support.microsoft.com/kb/961894Hope this helps others,Etienne