I just upgraded to 4.2.1. So far everything seems fine except gmail won't auto-sync. All of my emails are there but if I receive an email it will not show up on my phone until I manually sync it. If I email myself from my phone I will get the email right away as well as a notification. Sometimes an email will trickle in (I haven't narrowed down why) but when it does I won't get a notification. If it does trickle in it's usually 2-5 minutes after I receive it in gmail webmail. My friend did the same process and to resolve the issue he wiped the dalvak cache (from the App info window) and then rebooted but this did not work for me. I tried to reflash the GApps file but I have the same issue. What I've tried: -Reflashed Gapps. Both from GooManager and Clockworkmod -Turned auto sync on and off -Wiped cache and dalvik cache -Fixed permissions -Deleted app data Any ideas?