Hello, A Chimera production release candidate (version 1.7) is available; please try it and report any problems: <http://www.cgl.ucsf.edu/chimera/download.html> New features include faster loading and graphics, improvements in lighting and interactive shadows, "click-to-center" mouse mode, map display as orthogonal planes, interface to Modeller for building missing loops, Animation timeline, enhanced commands for animation, and interfaces to PDB2PQR, APBS, and AutoDock Vina single-ligand docking. See the release notes for details: <http://www.cgl.ucsf.edu/chimera/1.7/docs/relnotes/1.7.html> Mac PowerPC and OS X 10.5 are no longer supported. Elaine ---------- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco