Setting 'QMAKE_LFLAGS_DEBUG += /MAP' in .pro file to specify the creation of a map file in a VS project could result in a invalid .vcxproj file.

See attached example:
Using Windows 7, VS 2010 and Qt-4.7.0-Beta2. Setting QMAKESPEC=win32-vs2010. Run qmake on test.pro. When opening test.vcxproj in VS2010 get error message (ErrorMessage.png).

Solution:
In file 'qmake/generators/win32/msbuild_objectmodel.cpp' line 1573:

case 0x0034160: // /MAP[:filename]
GenerateMapFile = _True;
MapFileName = option+5;
break;

Since the map file name is optional the code above could generate a invalid MapFileName. Code should be:
case 0x0034160: // /MAP[:filename]
GenerateMapFile = _True;
if (*(option+4) == ':')
MapFileName = option+5;
break;

Should be also changed in 'qmake/generators/win32/msvc_objectmodel.cpp' line 1431.