IE 7 generates a Permission Denied error when fireing an ajax request. I have tracked this to the fact that minified files is inserted directly after the <head> tag causing it to precede the <meta> content-type tag.
Is there a way to control where the minified links are placed?
Read about the bug and solution at: http://stackoverflow.com/questions/2318743/jquery-ajax-problem-in-ie7-possibly-other-versions-as-well