Calendar syncing between your Mac and your iPhone or iPod touch as always been a bit squirrelly once you go beyond the basics, and despite Apple's rolling out new versions of all the software involved, it's still squirrelly. Take Control author Michael Cohen runs down the options and offers a possible workaround to duplicating calendar events in TidBITS, in Preventing Duplicate Calendar Events in iPhone OS 3.1.

—Posted by Tonya Engst on September 18, 2009