Comment 16 for bug 280188

Having a conflict resolves the packaging error, but it doesn't make libgtkada2 usable since zenity is a dependency of several core Ubuntu packages, e.g. ubuntu-desktop, metacity. Therefore I think it is more reasonable to resolve this by removing the gdialog symlink from the libgtkada2 package as per the debdiff attached above. As far as I am aware there are no other packages that depend on the existence of libgtkada2's gdialog, so this should not cause any breakage.