Okay, I've come to afterthoughts to what my problem is. All my demos have center aligned guns (I can't change the alignment in demos) and prophets gun just doesn't look so good on center view (looks like a stick to be more specific), so for minstagib advertising purposes I decided to replace it with another more representable model that looks cool on center view. Default minstanex gets double drawn on demos recorded in your server, maybe because it's aligned differently on your server (closer to the player), maybe that's one reason it bugs. So anyway.. default minstanex is out, but I tried redroomgun and it seems to work fine. Problem is, it looks retarded on center alignment too.
Is there any other minstanex model mods around I could try playing with, to see which looks coolest on center? Would be win if anyone had the default minstanex from Nexuiz for instance.