I don't use google, but I admin two mail servers; an Exchange and a regular IMAP server.

I've added my accounts from both servers, set them both to get mail "as items arrive" and sent myself a series of test messages from another account.

So far i'm not getting notifications of new mail from any account.
I tried flipping between "xx mins" and "when items arrive" and the "xx mins" work, but once it's set back to "when items arrive" I get no notifications.

Additionally, looking at my IMAP server activity, once the Pre checks the IMAP folders for new messages, it immediately(an uncleanly) disconnects. It does not stay idle to listen for new messages.

Anyone having this problem or am I all alone here?