We fully support IE8, IE9, FIrefox 3.6, Firefox 4, Firefox 5, Safari, and Chrome.  If a feature is not working in one of those browsers, please log a report at https://www.assembla.com/spaces/AssemblaSupport/support/tickets.  

We do not officially support IE6 or IE7, but most features other than the Agile Planner and Cardwall should still work in IE7.