cool blue,
I upgraded from IE5/OE5 to IE6/OE6 without any problems. There are always problems and these are usually what get posted, not the other 90% of cases that go well. Back up all of your OE address books and data files and give it a go. The locations of these files have been posted in some recent threads. If it doesn't work, definitely try Netscape/Mozilla which are far less susceptible to viruses, malware and security probelms in general.
goates