Thanks Elliot,
I haven’t managed to fix it either, tried disabling all other plugins and even switching themes but it doesn’t work still, only on the options page, I do have a similar set up on another site (only one options page registered though, although different hosting setup) and it works there. I have almost resigned myself that it must be a jquery problem in my template, or some kind of permissions problem, but haven’t had time to look any further.
