As per http://www.atomicthinktank.com/viewtopic.php?f=21&t=35619&p=643551#p643551:
Basically, the strength bonus is being added in a number of cases where it ought not to be. The Taser is one, as is Shuriken. Honestly, I can't figure out where the criteria on whether an item is ranged or not comes in as to whether it automatically comes in as mighty or not. When using the editor to copy existing weapons, none of them seemed to have either check-box checked for "use strength bonus even if ranged" or "don't use strength bonus even if melee". The guns work properly FWIW.
Basically, the strength bonus is being added in a number of cases where it ought not to be. The Taser is one, as is Shuriken. Honestly, I can't figure out where the criteria on whether an item is ranged or not comes in as to whether it automatically comes in as mighty or not. When using the editor to copy existing weapons, none of them seemed to have either check-box checked for "use strength bonus even if ranged" or "don't use strength bonus even if melee". The guns work properly FWIW.