A potential "Y2K7 problem"
A member of the Visual Studio team at Microsoft blogged about a "Y2K7" (year 2007) problem they were facing with the build numbers they were using. They used a file versioning scheme like Major.Minor.Build.QFE where the Build number representend the build date in YMMDD format. For example 50325 means the file was built on March 25, 2005. The problem is that this number would become 70101 on January 1st, 2007, but this version number field is only a 16 bit integer which can hold a maximum value of 65535. Therefore Microsoft changed their build numbering scheme earlier this year. If you are using a similar scheme you only have few days left to change it.
http://blogs.msdn.com/quanto/archive/2006/12/19/y2k7-crisis-coming-up.aspx
Happy Y2K7 everyone!