probably a known limitation, but filing in case: I installed the new android beta (14) today and went to setup sync. I entered the code, both the phone and desktop churned, and the desktop copy (nightly) said everything was good while the phone said it could not sync and gave me the option t try again or manually sync. Tried a few times. The eventual fix was to uninstall Aurora and try again.
Thanks Corey. Yup, this is a known limitation. We're still trying to figure out a good long-term solution for this.
This was fixed by Bug 772645.