Apple issued a large patch yesterday for its Leopard operating system. While the iCal calendar exploit got a good bit of press back when it was discovered in January, most of the over forty bugs and vulnerabilities addressed in the patch haven’t really been front page news, although many of them seem fairly serious. The days of “security by obscurity” for Apple users are gone now as Apple gains market share, so if you’re running Leopard make sure your computer is patched and up to date. While Security Update