If your computer has Mac OS X 10.2.3 through 10.2.8 and iCal 1.5.4 installed, and iSync is configured to sync with a Symbian OS-based phone, iSync might unexpectedly quit when opening or syncing.
iSync may also quit when adding a Symbian OS-based phone.
To resolve the issue, download and install iCal 1.5.5.