1.6.6 Can't shoot using steamgun/Annihilator

[GlassGo]

Went into heart of Gloom, came into LoS of few rares (all of them Tinker classes, few annihilators) and then lua error popped up. After that my char can't shoot anymore.
Maybe it isn't realted to HoG, maybe it's last level up problems, when I put some skill points in some skills, dunno.