Less than three weeks after version 1.5.4 of iCal arrives, Apple releases another update of its calendar software through the Software Update utility. This is a minor update bringing iCal to version 1.5.5.

Here are the notes that appear on the Software Update utility:

iCal 1.5.5 includes improvements in iSync synchronization on computers running Mac OS X version 10.2.

iCal 1.5.4 or later includes security enhancements to help protect your computer when subscribing to calendars or importing events with alarms that open files or applications.