Address listed twice in address book in v0.3.23-beta

[TT]

I'm using v0.3.23-beta on OS X.

I created some new addresses. Most of them seem to have been created fine. But one of them
got listed twice in my address book. Each instance lets me give it a different account. When
I try calling listreceivedbyaddress, sure enough, it gets listed twice and each instance claims
to have its own balance.

Is there any way to fix this problem other than to trash the wallet and create a new one?

Please help...