while i am not a ms lover i do use IE and dont have a problem with it but:
The Secunia web site at
http://secunia.com/advisories/11978/ lists the following as vulnerable....
Software: Internet Explorer 5.x for Mac
Konqueror 3.x
Mozilla 0.x
Mozilla 1.0
Mozilla 1.1
Mozilla 1.2
Mozilla 1.3
Mozilla 1.4
Mozilla 1.5
Mozilla 1.6
Mozilla Firefox 0.x
Netscape 6.x
Netscape 7.x
Opera 5.x
Opera 6.x
Opera 7.x
Safari 1.x