Apple has confirmed it shipped over one million copies of Safari for Windows within 48-hours of releasing the free public beta software.

The company has also introduced a security update for Safari for Windows users. This update addresses security vulnerabilities identified and widely-reported in the 48-hours following the release.

Apple claims Safari 3 to be the fastest browser running on Windows, rendering web pages up to twice as fast as Internet Explorer 7 and up to 1.6 times faster than Firefox 2, based on iBench tests.

Safari 3 for Windows requires Windows XP, or Windows Vista, a minimum of 256 MB of memory and a system with at least a 500 MHz Intel Pentium processor.

Safari updates are delivered seamlessly through Apple’s Software Update, and the first update for Safari for Windows Public Beta which fixes some early reported bugs was released last night.