I have produced a small matrix of tests for various Web browsers and versions for some chemically relevant web pages. http://www.ch.ic.ac.uk/compat.html I am seeking further examples of pages which perhaps fail on one browser but work on another, or fail on one version but work on another. Do please send me good examples if you have them. I don't have any ActiveX examples, or non-Javascript examples, so please send those. Also, any dissenters for my claims are most welcome! Failures by the way should be reproducible. Plain old browser crashes which occur at random are too dependent on machine configurations and memory allocation to be really useful. Finally, I might note that in our hands IE 4 fixes a number of problems with Chime, Javascript and other features of IE3. Dr Henry Rzepa, Dept. Chemistry, Imperial College, LONDON SW7 2AY; mailto:rzepa@ic.ac.uk; Tel (44) 171 594 5774; Fax: (44) 171 594 5804. URL: http://www.ch.ic.ac.uk/rzepa/ chemweb: A list for Chemical Applications of the Internet. Archived as: http://www.lists.ic.ac.uk/hypermail/chemweb/ To unsubscribe, send to majordomo@ic.ac.uk the following message; unsubscribe chemweb List coordinator, Henry Rzepa (rzepa@ic.ac.uk)