see, I'm having the exact same problem, but i HAVENT deleted the stock app. i tried turning juice defender off, updating roaming, whiping the cache. the only thing that worked one was turning auto-retrieve off. but that still only worked once. so I'm pretty stuck and frustrated with this. if anyone has suggestions I'm willing to try just about anything.
so, i think i figured it out. i deleted the email while deleting bloatware, and i also deleted the email authenticator. for some reason leaving the authenticator alone after reflashing the rom solved the problem. hope this helps.