I'm using the qt designer and creator IDE.
I want to use a QGroupbox with the border and the title and in windows it works fine and the component looks like it should. But
in linux the border is lost.
Is this a well known problem with a simple solution or??
Which environment (Gnome/KDE) are you running in and which theme do you use? Some themes do not work perfectly when put onto Qt applications:-( This is even more true when using the gtk-theme integration where Qt does have slightly different usage patterns compared to native gtk apps.
So try another widget theme and "report a bug":http://bugreports.qt.nokia.com/ if you want a troll to look at the issue.
I use debian with gnome.