Originally Posted by fonejunkie
There was an issue reported a while back with the calendar items not being restored from backup after an OS upgrade.
First, make sure you are using the correct calendar. Go to OPTIONS / ADVANCED OPTIONS / DEFAULT SERVICES and make sure you have the correct calender listed in the Calendar (CICAL) field - it should be the one associated with your default email address on your BlackBerry.
Next, try to restore the calendar using the ADVANCED restore function of the Desktop Manager software and the backup created as one of the first steps in the OS upgrade process.
Thank you so much...I was having a problem with my calendar and it had switched to picking Facebook calendar and you solved the problem!!