Error 13 /platform:anycpu32bitpreferred is not a valid setting for option /target:library or /target:module

If you find this error while compiling VS2012 Windows 8 (aka Window Store and/or Windows Metro) applications:

 

Error 13 /platform:anycpu32bitpreferred is not a valid setting for option /target:library or /target:module 

 

then the solution seems to be to edit the csproj file to remove <Prefer32bit>true</Prefer32bit>

 

Here's where I found the solution: http://social.msdn.microsoft.com/Forums/en/toolsforwinapps/thread/927835d1-7c4d-4c30-acb7-848d8de5cb1b

 

Open the project file in notepad and remove <Prefer32Bit>true</Prefer32Bit> then reload it  (you can also right click on the project in solution explorer, choose unload project, right click on the project again, choose edit someproject.csproj, after making the edit, save, and right click and reload.