Hi all,
We have put out a 1.6.1 release which, along with some minor fixes, corrects these problems:

 - Graphics would be corrupted or chimera would crash on recent versions of Linux, e.g., Ubuntu 11.10 and Fedora 16
 - Planes (of Axes/Planes/Centroids tool) failed to start
 - Inappropriate "file types" (e.g. PDB ID) included in the file-type list of the main Fileā†’Open dialog
 - Very old sessions (pre-2006) would not restore on 64-bit Windows

Please download 1.6.1 if these problems are affecting you.

--Eric


                        Eric Pettersen

                        UCSF Computer Graphics Lab

                        http://www.cgl.ucsf.edu