Vulnerabilities remain in Apple Inc.’s iCal calendar program, a security company says. Apple kept shifting the deadline for delivering iCal patches, Core Security says. The vendor put its foot down and told Apple it would release information about the vulnerabilities May 21. Apple has not patched the three iCal vulnerabilities spelled out by Core Security. Apple is the scheduling and to-do application bundled with Mac OS X bundled with OS X for personal use and for business purposes. iCal is used both as a standalone personal calendaring program and as client for connecting to Apple’s calendar server.”]