Just pointing out something in case you were not aware of it yet.
If you have any polls created by admin in the D6 version or earlier of Dolphin, then with the transfer to D7 came an actual membership ID for admin as opposed to not having an ID and just being called admin.
As a result, your old admin polls will be allocate an ID profile number of "0". This lack of ID number of 1 or above means that whoever looks at the numberless profile will think there is a mixup as their profile picture will appear by the poll.
It's easily fixed by going into your database and adjusting the "0"'s to your new profile ID.
Of course you should make a backup of your database before making any changes in case you fluff things up.
Not really a major problem but at least it will stop some of the emails asking why this is.
Laterz....Prof