<script>

$.get('url', {}, function(contents) {

$.globalEval(contents);

// call of a function declared in "contents" fails in FF

});

</script>

<script>

document.write("<script src=\\"delay.php?r="+Math.random()+"\\"></"+"script>");

</script>

In IE/Safari/Chrome it works, in FF2/3 it fails. Looks like firefox schedules the <script> tag created by globalEval to be executed after "delay.php" finishes, so any code right after globalEval() does not work.