[HUG] 2000 negatives problem...

Before I call Hasselblad service (it was CLA'd recently):  there's a new 
problem occurring with either the 2000 body or my two well used A12 backs (one 
back holds self developed B&W, and the holds lab developed color). Several 
negatives display a 1/2" wide light-leak kind of ghost line horizontally across 
the middle of the negative, but not quite reaching edge to edge (horizontal, 
when holding the strip up and down).  On either side of this ghost line, the 
negative is dark.  Sometimes the adjacent negative is perfect.  Sometimes the 
adjacent negative is black or deep gray.  As I say, the problem has just 
started. I do switch backs regularly, and perhaps the back isn't snapped tight 
to the body, but that doesn't account for the 1/2" line being horizontal on the 
frame.  And worn seals (on both simultaniously!) wouldn't account for the 
perfect negatives.  Any clues, folks?

Other related posts: