In Visual Studio 2012 in Solution Explorer window have doubled file names (sorry for no screenshots - here is the link http://floomby.ru/s1/uaxC8K). In the same time it's all right in File Explorer and in project file (http://floomby.ru/s1/WaxCv8).
It's really annoying thing and cant find the reason why is this happening. What can be done to prevent such behavior?