Yes, this IS very frustrating. The battery pull did not fix the problem. According to all of the manuals and forums, you are SUPPOSE to be able to set up more than one gmail or google apps mail account on your Droid. But I can only set up one gmail account. I cannot set up my other gmail account OR my google apps mail account without getting the error message, "can't establish a reliable connection to server"
I have tried everything and have searched every forum. I am hoping that the upgrade to 2.2 will fix the problem. For now, I have all my emails forwarded to the one Gmail account that will download to my Droid. But that is a real pain since I don't want the emails mixed.