All weapons in Nomos have been upgraded, due to some changes of the SL viewer. A few more info:
a) Chainsaw and Circular Saw are now type LONGSWORD
b) the code of all first release weapons has been optimized and unified, and made used of new LSL functions.
Tomorrow version 0.90 will become mandatory in Nomos, but you can get a free upgrade at the SIM entrance. Click on the SIGN for HUD Upgrades. If you have any problem, IM Kora Zenovka.