I'm trying to sort out as to why Flightgear runs so slowly ever since a Sarge upgrade killed it... "apt-cache depends flightgear" returns things like: |Depends: <xlibmesa3-gl> Depends: <libgl1> libutahglx1 mesag3 mesag3+ggi mesag3-glide2 xlibmesa-gl Depends: zlib1g I'm not understanding the packages prefixed with | and <> surroundings... Anyone got a minute to point to some docs? thanks!