I am not using a program right now to back up everything. Under Accounts and Sync, I have Background Data and Auto-Sync checked.
Under manage accounts, Google has the green sync, Vcast Media Manager has the green sync, along with Weather and Yahoo.
I think the problem was related to my Calendar which I had backed up from my Incredible and then restored to the Rezound. As soon as I completed the restore of the calendar, I started getting the following notification:
Sync: Too many to delete
I just went into Applications, Running Services, All, Calendar Storage, Clear Data.
Powered off and then back on and my calendar looks fine, except the holidays are appearing duplicated. I have been using the HTC Calendar and Google Calendar, but need to move over all my events to Google Calendar.
When I manually sync it completes without displaying the error.
What are you using to backup your phone?