OK, it is probably safe and good to upgrade to IE 5.2 for OSX. Microsoft released it last week, and there were many screams from users because it changed the home page to MSN for some people. I did the install on two different systems just now, and it changed the homepage to MSN on one of them. I attribute this to lameness, not maliciousness, but it is still dumb on their part. "Oh, gee, now I see the light and I want to use MSN as my home page." Yeah, right.
Anyhow, the new browser is more stable than the old one for displaying some "tricky" pages, at least for me. I can almost hear Cory screaming now, so let me emphasize that YMMV.