Anyone have an idea?

Anyone have an idea why this is showing up on my site?

I was able to get rid of it in my development environment but I really don’t know how i did. It is on my live site now, though after a page is cached, it does not show up.

here it is:

Mac OS X 2??ATTRQ???&?&;4a96dcf4;Safari;| resource fork intentionally left blank ??