BB Device Software :: Memo / Task Data Cleared After OS Upgrade?

I have a Blackberry Curve 8310 with a data plan and I recently did an OS upgrade using the update feature on the phone itself. However, after the upgrade I noticed that my memo pad and task data were cleared out which seems odd to me, because it spent a good chunk of time creating a backup, and after the update the core data, communication data, and calendar data remained intact. This is somewhat stressing because I had typed a few ideas out on my phone's memo pad and had not backed them up (slap on the hand for me), and now I no longer have access to them. Has anyone else had this problem? Does anyone know if this backup data might still exist?