Hi everybody, A new production release, version 1.2540, is now available from: http://www.cgl.ucsf.edu/chimera/download.html#production Many improvements and new features have been added since the previous production release (Nov 2007), as detailed in the release notes: http://www.cgl.ucsf.edu/chimera/docs/relnotes/1.2540.html For the time-challenged, here are just a few of the reasons you may want to use the new version: 1) new fetch types: - comparative models from ModBase - protein pocket data from CASTp database - small molecule structures from Pub3D - small molecule structures built from SMILES strings 2) surface improvements: - increased reliability - surface areas automatically calculated - Actions menu, other tools work on more types of surfaces 3) appearance: - default lighting changed to improve POV-Ray results - larger default scale - helix ribbon insides can be colored separately - 2D labels can include Greek letters and other symbols 4) new tools: Axes, EnsembleCluster, Solvate, Structure Diagram 5) new commands: export, mclip, molmap, perframe, ribinsidecolor, shape, solvate, topography, vop See the release notes for details. The production release includes versions for Windows, Mac/X11, Linux, SGI IRIX, and HP Tru64. The Mac Aqua version has been improved significantly, but for now remains a snapshot download: http://www.cgl.ucsf.edu/chimera/download.html#snapshots Enjoy! The Chimera Team