QFileDialog::getOpenFileNames doesn't show any file

A Qt application installed on Symbian^3 with Qt 4.6.3 works correctly; after installing Nokia Bubbles (with I think sports Qt 4.7.x), the function "QFileDialog::getOpenFileNames" shows folders but, instead of listing files, it says "No data" inside folders. The file dialog is also completely different (I think it uses a native one now).

I call the funcion with the following parameters and it works with Qt 4.6.3 on Symbian^3 and with Qt 4.7.x on S605th, Windows, Linux, OSX:

QStringList files = QFileDialog::getOpenFileNames(this, "Select file", "", "Any file (.)");

Is there any other way to call it? Anyway, if you want to have 4.6.3 compatibility, it should work with these parameters.