Copying to clipboard fails with CO_E_NOTINITIALIZED error when linked with C++/CLR library

My Qt appliactions fails to copy selected text from QLineEdit when C++/CLR library is linked.

If it is linked, but zero calls is invoked from it, everything works OK!

Otherwise, by clicking Ctr+C I get error message in Application Output (QtCreator) like this:

OleSetClipboard: Failed to set mime data (text/plain) on clipboard: CO_E_NOTINITIALIZED ()

Selected text is not copied into clipboard.

To demonstrate this, I've prepared small test suite, see attachment.

Firstly, compile "dummy_clr_lib" C++/CLR project using Visual Studio 2010 Express (I do not know if version actually has affect in any way) in release mode, so release/dummy_clr_lib.lib will appear.

Next, compile "clipboard-test" Qt project, that links to mentioned library.

Run it in QtCreator/Visual Studio, so Applicaiton Output is visible.

Select text in line edit, press Ctrl+C - "CO_E_NOTINITIALIZED" error should be printed in output.

To disable this effect, comment-out this line in MainWindow.cpp:
dummyCppClrCall();
...and copying to clipboard should now work.

So, it needs at least one C++/CLR call to break something...

I've selected "Core: Plugins" component because this error (looks like) originates from Windows platform plugin.