I upgraded my iPad to iOS5 this morning. Everything went well, but I'm having some trouble with the iCloud email account. I set it up on the iPad and tested it. I was able to send an email to my Gmail account and it worked perfectly. But when I send a reply back to the @me.com account, I get a message back in Gmail telling me the message is undeliverable. So I can send emails without a problem, but I can't receive them for some reason. Any ideas? I was thinking that not having iCloud backup enabled might be causing the issue (every time I try to enable I get a error telling me that it can't, with the option to cancel or try again) but I'm not really sure if that would affect it or not.