>  The angle of the inner fitting to the body has to be very close all by
> itself; you can't just hog it into place with the fitting screws.  A
> broomstick fits nicely into the fitting to adjust it.
>

This was the right tip.  The problem seems to be fixed, and all I did was
remove the exterior vent, bent the pipes so that they were naturally very
close to being in the right position, and reassembled.  (I also straightened
a slight bend in the metal plate that separates the exhaust side from the
intake side).  I didn't have to remove the fridge again!

Thanks very much,
Wes