Apple released Safari 5.1.5 , a minor update that patches a specific glitch when running Safari in 32-bit mode. The patch notes offer no other details.
The update is for Snow Leopard and Lion, and it can currently be downloaded through Software Update or from Apple’s Safari download page.
Safari 5.1.5 requires
Mac OS X Snow Leopard 10.6.8
OS X Lion 10.7.3
Windows XP SP2 or Windows Vista or Windows 7
UserAgent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.7; en-US; rv:184.108.40.206) Gecko/20120306 AlexaToolbar/alxf-2.14 Firefox/3.6.28