I get a few odd things with 0.10.7 though, Interplanetary transfers inwards in the Kerbolar system, for instance Duna to Kerbin, seem to set the right amount of deltaV, but in the opposite direction. Intercepts between vessels with Hohmann transfers, when the the orbits are close, do something similar. I can't completely rule out user error, but in that case I'd be quite consistent in my errors :-)