This isn't an important question, but something that has been bothering me for awhile and my google-fu wasn't able to find an answer. 

I know that Visual Studio 2013 is version 12 and Visual Studio 2012 is version 11.

Why did Microsoft make the icon for VS2013 solutions have 12 in it (their version number). And VS2012 solutions have 11 in it (again the version number)? VS2010 solutions correctly has 10 in the icon, even though the file format says its version 11.

Now this might just be on my machine(s) because I have multiple versions of VS installed (and editions), but it is just something that makes my head itch.