I keep getting strange error when I sync

"iTunes cannot sync calenders to iphone because an error occurred while sending data from the iPhone."

I don't even use the calender but it does this every time I sync.

Whats up?

I just got my phone a few days ago... I did not see this error the first few times I had the phone connected, but I am seeing it now.

I am doing some video encoding in the background and I have the Elgato Turbo MPEG-4 encoding accelerator connected to the USB port. I wonder if that could be affecting anything.