So somebody at Microsoft screwed up and put the wrong version of vgx.dll in IE 5.5. The correct version will go into IE 5.5 SP2. And you can get the hot fix if you need it, but you have to bellyache a bit, and you have to understand that it hasn't been fully tested. I often wonder why Microsoft goes to such lengths to hide minor problems. On the other hand, if you have IE 5.5 installed and it's working fine, don't sweat it.
Life's too short.
I spent forever trying to find it. So if there's a chance you're going to need the patch, click on the link above now and bookmark it. AltaVista announced yesterday that December 10 would be the last day they offered free Internet access. Apparently their provider, 1stUp, is going out of business. This is just another in a string of problems in the free access market.