Windows: file browser not working properly using the qmlvideo example

Using RC2 packages qt-windows-opensource-5.1.0-rc2-msvc2010-x86-offline and qt-windows-opensource-5.1.0-rc2-mingw48_opengl-x86-offline. On windows 7 pro 64b.

• Open the example examples/multimedia/qmlvideo
• click "Select file 1"
• click the top left green arrow to go up
  => problem, nothing happens
• now click on the debug folder and up again 2 times
• the navigation up work as expected
• click up multiple times until there is not folder to step up to
  => problem it navigates to an undefined file:///Qt and the page is blank. Thus it is not possible to navigate away from this useless page. Restarting the application is needed to reset the current folder to an existing one.

This problem does not happen on Ubuntu.