I'm using C++ in the Nokia Qt SDK

I also use .setAttribute(Qt::WA_Maemo5StackedWindow);
with the right parent window, of course.

When I press the button once, it stacks perfectly, however when I press it multiple times, it opens multiple windows, which then don't have a parent window, and are shown as separate windows.

The window takes some time to load, that's why it can be pressed more than once.