QTR-Quadtone RIP

I have been using K6 on my Epson 7500 with OSX 10.4.9
successfully for about 15 months. Now, with QTR 2.5.0,
it looks like all my tones from 55 to about 90 percent
are the same--that posteriorized look.  It looks like
all my carts have been switched around by some evil
demon.

If, just for the sake of argument, we assume I am not
an idiot and know how to profile and set things up in
"print with preview" and in the QRT interface, could
the RIP itself have changed in such a way as to demand
a different line-up of carts?  I will answer all
follow up questions in detail regarding my set up and
settings, I just want to know now if anyone is having
the same problem now or knows if the cart positions
have changed in the RIP itself.  thanks.

Jim