105,106c105,108
< 			fFigures.removeElement(figure);
< 			figure.removeFromContainer(this);   // will invalidate figure
---
> 			// Bugfix: This call will cleans up the quad-tree as well [JY]
> 			super.remove(figure);
> 			//fFigures.removeElement(figure);
> 			//figure.removeFromContainer(this);   // will invalidate figure