port uninstall should consider upgraded ports

Hi Example (the story is real, only the versions numbers have been changed) : port upgrade gtk2 ... port installed : gtk2 2.10.4 gtk2 2.10.8 (active) port uninstall inactive : can't uninstall gtk2 2.10.4 because gimp2 depends on it. I am right to expect NOT having to force such an uninstall ? yves