I work in the industry and am running a eval copy of Windows 2000, IE 5 and there are some bugs to work out of W2K. As for Netscape, their newest browser does have some serious bugs. If there are tags or HTML that are IE specific it can stall or crash. They are working on it and are also trying to make it more universal. Hit their site and see if they have any patches yet. I haven't seen anything new in the past two months.