My window is built up from a NoteBook widget. And in each NoteBook widget there's a VBox.
Everything looked good untill I added an EventBox to one of the VBoxes(corresponding to a tab of the NoteBook widget). That EventBox contains a HBox, and that HBox contains some labels.
But now my buttons of my VBox are overlapping the tabs of my NoteBook widget.
To show what I mean, i've created a small screenshot: http://img59.imageshack.us/img59/6268/overlapproblemjy1.jpg
I've tried to fix this by calling the function size_allocation on the EventBox, but of no avail.