vs2010+Qt4.7.2+Addin1.1.9: The build must be stopped before the project can be closed

I am developing under VS2008/Qt 4.6.2 and 1.1.7 version of Qt.Addin.

My goal is to upgrade to the most recent releases of this environment, i.e VS2010/Qt4.7.2/QtAddIn1.1.9
I made fresh VS2010 install with patch applied + Qt 4.7.2 and VSAddIn 1.1.9

Now I am getting this extremely annoying popup every time I am compiling the project under VS2010+Qt4.7.2+Addin1.1.9:

"The build must be stopped before the project can be closed"

"VS2008" environment does not have this issue.

Any help in getting rid of this popup will be greatly appreciated.