Hardcore gmap problem.

[Enerith]

As odd as it is, our gmap just stopped working one day for most new players, without any script changes or anything of the like. All of the obvious is in place (gmap is in server ops, we load the map, etc etc) But heres whats happening: our old staff have no problems seeing/walking the gmap. Some of the newer staff/players only see a single level of grass with no npcs or players when they are warped to the gmap. To mix it up, we can see them, but they cant see us... and they can see our projectiles. I was told that this problem could have something to do with the levels having a "-" (ci_world-am060.nw) in the name, and the npcserver treats it as a minus sign for gmaps, but as this is a VERY large overworld, i'd rather not redo the map so I was wondering if anyone knew otherwise.
Thanks,
madj

Edit: all of these players (working and not alike) are using v4.