Why the hell do you have Internet Explorer installed on that thing. Where do people keep getting this crazy insane idea that IE:Mac is a current browser worth considering installing on Intel Macs, and that it is somehow related to IE on PCs? It even clearly says in Microsoft's web site "do not download this" with a nice link to Safari. I mean you really had to have tried to hard to find IE somewhere and install it.
That aside, MySpace not working is quite a frequent occurrence. It isn't the end of the world - probably a good thing. Gets all those people that live on MySpace all day away from the computer, or at least to some better web sites.