Safari in Mac OS X 10.3.9 and 10.4.2 submits forms from an XSL formatted page to the next page that is browsed by the user, which causes form data to be sent to the wrong site.
Safari in WebKit in Mac OS X 10.4 to 10.4.2 directly accesses URLs within PDF files without the normal security checks, which allows remote attackers to execute arbitrary code via links in a PDF file.