Updated to iOS 5 and now photos sent with text message show as sent, but are not received to an iPhone that has not been updated.

Updated  to iOS 5 and tried sending a message with a phot to an iPhone that has not been updated. My message shows as sent, but neither the text or photo are received. Text alone works fine.
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This is being caused by using the same Apple ID for iMessage.  To fix this you have two choices:
On all but one of the phones go to Settings>Messages>Send & Receive, tap the ID, sign out, then sign back in with a different ID.  Note: you can still share the same ID for purchasing in Settings>iTunes & App Stores; or
On all of the phones go to Settings>Messages>Send & Receive and uncheck the email address(es) shown under "You can be reached by iMessage at".