Apple has released an update to the Safari web browser, which fixes a large number of issues including potential unexpected application termination or arbitrary code execution when visiting a malicious web site.
* Safari 5.1 is available for Mac OS X v10.6.8, Mac OS X Server v10.6.8, Windows 7, Windows Vista, and Windows XP SP2 or later. (Note that Safari 5.1 is included with Mac OS X v10.7, also known as Lion.)
* Safari 5.0.6 is available for Mac OS X v10.5.8 and Mac OS X Server v10.5.8.
(Note that Safari may have been installed on some Windows installations with an iTunes installation or update.)
For more information, see http://support.apple.com/kb/HT4808