meghan leigh,
Since this issue is occurring on multiple iPhones and it's isolated just to this one website, it might be best to report this to myspace directly. After all, it was working before and I tested it on an iPhone running 1.1.4 and the same issue occurred (so it's likely not the iPhone software).
We can report an error to MySpace here:
http://www.myspace.com/myspacehelp
It appears you can subscribe to their blog there to see if it's a reported issue as well and possibly an estimated time of resolution.
I'm happy to report after installing the MySpace app on the iPhone, that seems to work just fine.
Hope this helps,
Raleigh