When weapon id's are changed (basefirstweapons,second etc.) it gets bugged >.<, doesn't matter if you do it in-game or through meta.xml, you can't see the weapons on the menu (you can see a few but they're bugged and all you can see is just an id or a bracket..). Ill post a screenshot later. It turned out not to be a server problem as I thought before. It doesn't happen on windows however..
I'm using 1.0.5