I don't know if this is due to valve, or if you can fix it. I've been jumping between #7 and #27 and tried changing my hat particle effect with no results. Weapon effects work fine. Some of my kill effects don't work unless they're melee. When I'm scout, and I shoot somebody, they die normally. When I kill them with my bat they turn to gold. Again, might be valve.
If you guys can fix it let me know, if not, it'd be nice if the options were removed and australium notified for melee only.
So far these are the only bugs I see besides the !shop invis player holding a weapon or particle effect. If I find any others I'll post here.