Flap/aileron don't line up -- always a problem?

My Comanche seems to fly straight, no heavy wing (without fuel imbalance)
and make book speeds. With the autopilot on in smooth air, and enough
right rudder trim to center the ball, the left flap and aileron line up.
The right flap and aileron do not. The flap is about 1/2" lower. The
aileron does line up with the wingtip, though having seen the structure of
the tip I wouldn't consider it a calibration point!

Does this automatically mean there's a problem? Or could this just be
a legitimate correction for a difference in washout between the wings?

--
Ben Jackson

http://www.ben.com/