That isn't a 1.6.7 bug .. it would show up as *dcc:-user instead of dcc:-user .. so a script somewhere (not sure if netbots does this or not) is overwriting the actual bind, use '.binds -user all' to find out some info about the binding.
correct i did find out right afterwards, its a conflict with a tcl i use, which worked fine with eggdrop 1.6.6 but i have been so busy recently i forgot to reply in here afterwards. I apologise for my mistake.