Changes by: Aleksey Nogin (nogin at cs.caltech.edu)
Date: 2006-03-02 18:45:26 -0800 (Thu, 02 Mar 2006)
Revision: 8828
Log message:

      Fixing a very nasty refiner bug, where the conditional rewrites were being
      applied incorrectly.
      
      This breaks 15 proofs (and makes everything that depend on them suspect).