A Chimera production release candidate (version 1.5) is now available: <http://www.cgl.ucsf.edu/chimera/download.html> As described in the release notes, many new features have been added since the previous production release: <http://www.cgl.ucsf.edu/chimera/docs/relnotes/1.5.html> Please try the candidate release and report any problems (Help... Report a Bug in the Chimera menu). Note Chimera 1.5 will be the last release for the X11 version on Mac. On behalf of the Chimera team, Elaine ----- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco