it seems that shift-double-clicking on a buccaneer+refmac job in ccp4i and rerunning it with everything the same (except output name) will produce results (c-alphas built, Rfree, etc.) that are non-identical after a few cycles. apparently this is holds for Intel mac osx 10.5 or 10.6 only, not Linux.
It would be interesting if any Intel mac osx users would be willing to confirm or refute this curiosity. Regards, -Bryan p.s: more details: ccp4 6.1.13 ccp4i 2.0.6 buccaneer 1.4.0 "buccaneer-pipeline v1.4" refmac 5.5.0109 mac osx 10.5.8 or 10.6.7
