With the proper Unix command, a malicious surfer could potentially delete directories or bring down a server. So far, Excite says that no web sites have reported intrusions based on the hole. Exite says they do not know how many people have installed the software. They have posted a patch and have left the original security-prone software online. MacFixIt reports that Microsoft's Internet Explorer 4 is more like a beta than a released version.
Users report various ailments including bombs, freezes and other strange behavior.
I've found JavaScript and HTML rendering quirks but most disturbing to webmasters was that IE4 Mac does not update a newly updated page on reload. This makes checking an updated web site with IE4 Mac difficult at best. This also happened in v 3.0 so the bug apparently hasn't been fixed. Microsoft will post a patch on Monday. Apple will reportedly bundle an older, more stable version of IE with their new operating system.