Im developing a site for a local group and testing it in IE9/ FF11 and the latest Google Chrome it looks and runs perfectly. When I went to show them, unfortunatly they only had two PC's, one with IE7 and the other with IE8. Xenporta didnt display correctly in IE7/IE8 and Xenmedio dosent work in IE7/IE8. I have posted in the relevant threads but not received any feedback, so was wondering - Is it unprofessional or too early to put a notice on the site up saying that anyone using IE7/IE8 is using an outdated browser and will not benefit from the full features of the site? What browsers do you activly support and when do you decide to call it a day?