Update of MRST Parton Distributions
  We discuss the latest update of the MRST parton distributions in response to the most recent data. We discuss the areas where there are hints of difficulties in the global fit, and compare to some other updated sets of parton distributions, particularly CTEQ6. We briefly discuss the issue of uncertainties associated with partons. 
R.S. Thorne, A.D. Martin, R.G. Roberts and W.J. Stirling