plugin/platform error dialog for qttools(designer,linguist) when you compiled Qt 5.1.1 from .zip sources

I downloaded the Qt 5.1.1 zip source for Windows.
I built using VS2012 Update 3.
To compile it I opened a VS2012 64bits command prompt, went to the [qtDir]\qtbase and I ran:

configure -debug-and-release -shared -ltcg -no-angle -opengl desktop -mp -no-ssse3 -no-sse4.1 -no-sse4.2 -no-avx -no-avx2

nmake

The build finished without errors and all looked ok... but when I double-click in the [qtDir]\bin\designer.exe or linguist.exe this dialog appears:

http://oi41.tinypic.com/2zh1moo.jpg

I also get that error dialog if I try to debug a newly created empty Qt project in Visual Studio 2012 with the Qt VS Add-in...

So it seems you messed the plugins/platforms folder location or may be a problem with the qwindows.dll platform.

I compiled the old 5.1.0 and works ok so I bet this is a bug in the 5.1.1.
thx