Package: xserver-xorg-dev Version: 2:1.7.7-3 Severity: wishlist I just debugged a problem of a user of a non-working just built third-party video driver that boiled down to non-matching versions of xserver-xorg-core and xserver-xorg-dev installed (different xorg-video-abi). It would therefore be nice if xserver-xorg-dev would conflict with non-matching versions of xserver-xorg-core.