Error when syncing iPhone 4

I recently upgraded to iPhone 4. Ever since doing that, I have been experiencing a problem when I sync the phone with my computer. I am constantly getting an error message that states:
iTunes could not back up the iPhone "" because the backup could not be saved on the computer.
I would say for every 5 times I sync the phone, I get this message 3 out of the 5 times. Most of the times when this happens, I click the Sync button in iTunes again and it usually syncs fine. There are a few times when it happens a second time and I just click the Sync button again and it usually works.
This is completely annoying and I have no idea why it's happening. My computer setup has not changed, my user account has not changed (I am the admin BTW). The only thing that's changed is I went from an iPhone 3 GS to an iPhone 4. And that's when the problem started.
I have reset the iPhone. I have deleted all old backups from the "~/Library/Application Support/MobileSync/Backup" folder. All of the things that have been mentioned here before.
If anyone has any other ideas, I am definitely desparate to hear them. Thanks!
Bronson

TehCanadian wrote:
unknown error 13019
try if the troubleshooting steps in this support article help.
JGG

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