I just started a page on "errors in chemistry visualization tools and chemistry data". It is available on: <http://www.cscs.ch/~mvalle/ChemViz/errors/index.html> The visualization part started as a by-product of testing of existing visualization tools to provide guidance to my chemistry users. The Data part collects examples for a course on scientific data management that I teach. If you have other examples I'm very happy to add them to the page. Also corrections and clarifications are welcome (I'm not a chemist...). Enjoy! mario -- Ing. Mario Valle Visualization Group | http://www.cscs.ch/~mvalle Swiss National Supercomputing Centre (CSCS) | Tel: +41 (91) 610.82.60 v. Cantonale Galleria 2, 6928 Manno, Switzerland | Fax: +41 (91) 610.82.82