[phenixbb] phenix 1.3-rc4 vs. phenix 1.3-final

[Jianghai Zhu]

Hi,

I have done a couple of refinements using either phenix.refine 1.3-rc4  
or phenix.refine 1.3-final.  And phenix.refine 1.3-rc4 always gave me  
a lower Rfree, about 1% lower than phenix.refine 1.3-final, which  
actually is pretty big.  What has changed between this two versions?

-- Jianghai