My big question - does it up yet more memory than IE5.01 ?
While I like some of the improvements in IE5 over IE4, nevertheless it uses a huge amount of memory, and often you have to kill all your browser instances to get it to give back all the memory. My old PC has only 64MB RAM, so even though I have 128MB of pre-allocated defragged swap file, nevertheless I find that all 192MB is used by only 3 or 4 instances plus Agent newsreader.