Duplicate e-Mail Since Upgraded to 3.0 ...

I am receiving duplicate e-mails on my iPhone since the upgrade to 3.0 when retrieving over the air or from wi-fi. I have an original iPhone (2G) with 16g. I have 3 e-mail accounts, 2 are from gmail (both giving me duplicates) and 1 from ATT (no duplicates). The e-mail service with gmail on my MacBook are using IMAP, whereas the ATT mail is POP. e-Mail on my MacBook is just fine, as it is if I retrieve via the net from gmail. Only duplicates appear on my iPhone.

If I delete just one of the e-mails, it actually deletes both. So I have to choose to keep both, or both get deleted.

Any solutions out there to this, or is Apple addressing??

Thanks

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