Browser/preloader weirdness

Ive never seen this before but the problem goes like this:

Ive have a pre-loader that works fine when testing locally. But when uploaded the pre-loader reverses in all tested browsers apart from firefox (see attached image)

I cant think why it would reverse like this especially after the document has been published. Its as if from somewhere the swf is getting negative values when loading the external file??? :wt: how would that be possible. Local testing with traces show no such negative values… :cross-eye:

If anyone has any ideas about this let me know

Thanks in advance