Dear All A little while ago I posted a message about the GUI freezing on linux systems, either run remotely (centos) or locally (ubuntu system). I never received a solution and I'm still having this problem despite upgrading to version 1.6. On my ubuntu system the GUI seems to freeze either when the screen saver comes on (set to turn the screen off) or I switch desktop - although not everytime I do this. The freezing GUI means that I have to force quit phenix after every refinement run (I haven't tried other tasks) and that the freeR is not reported to the GUI (not a major problem). Thankfully in version 1.6 the configuration and results for each refinement run are recorded and I can retrieve this information by loading a job through job history - a big improvement over version 1.5. Anyone else having this problem and does anyone know a solution? Thanks John -- John Berrisford Medical Research Council Mitochondrial Biology Unit Wellcome Trust / MRC Building Hills Road Cambridge CB2 0XY WEB: www.mrc-mbu.cam.ac.uk TEL: +44 (01223) 252918