Hi,
Pressing ctrl-G doesn't do anything for me. The guide marks show as boxes of crosses but do not disappear and I get no screens or anything. I use RSORadar (and satellite radar which gets overruled by RSORadar apparently but I haven't deactivated it yet).
I've read somewhere that RSORadar replaces the vanilla radar entity with it's own instead of chancing it. Maybe this has something to do with it.