Hey all, after finally giving OXS-apt (a.k.a. fink) a try and installing what appears to be the latest coot (revision 889 of pre0.5) a few days ago, I can now work for hours before X11 freezes. Jubilation!! However, this morning, a new error appeared. The coot viewer froze with the following error message: Xlib: sequence lost (0x2a092 > 0x1a0a5) in reply type 0x5! X11 is still responding, i.e. I can fire up ccp4 or PyMOL hybrid and work with it, and I can kill coot from a shell. Any suggestions how to prevent this error from returning? I'm working on a MacBook Pro, OSX v5.2, X11 2.1.4. Thanks. Andreas -- I am not stupid. I have read several books. Salman Rushdie - Midnight's Children