Tried this before and had issues. I think it was due to safari enhancer and removing metal face. But i use Iridium now. I tried this again and now works wonderful. If you can't get it to work you can always do it yourself...here

http://www.macosxhints.com/article.php?story=20050430171056385&query=safari

Use the button graphics from this program and backup..just in case...