my point about the split map_cache.dat thing is that since there are changes in the map, the npcs will be located badly since users wouldn't be able to walk to them or something like that btw I'm looking forward to see malufett work and you to add some more msgs =D
malufett got some already as you can see here
and about map_cache thing I've report it and Ind confirmed and I still think it is a good thing to add xD