Doesn't work for me.
The actual issue has to do with the use of tinyMCE in the page. It seems to be the cause of the issue in all the pages I've searched on it..
"
To turn off the popup warning:
in /design/tinymce/tiny_mce.js locate safari_warning and after the , change the word true to false
I'm not sure what problems the Safari users might have with the tinymce editor being "experimental", but they would only have problems when using the WYSIWYG editor.
"
I'm not particularly worried about having a WYSIWYG editor, any chance of trying this?
FWIW, I did check the source code and tiny_mce.js is called by the HTML
script language="javascript" type="text/javascript" src="design/tinymce/tiny_mce.js"