Interesting read. Ok, I hope it wasn't me that caused this, but I did bring up a backup of version of my wallet today. Here's what happened. After upgrading my wallet to version 1.1.4201, something went horribly wrong. When the wallet came up, the balance was listed as 0, and all previous transactions show up as 'failed'. So, I went through the wallet restore process....which worked. However, receiving addresses aren't restored through this process. Looking through the BEAM documentation, I couldn't find any method to dump a private key address from a wallet file. I needed to receive my last payout from leafpool.com on my old address. So, I  brought up a backed up version of the wallet (pre-upgrade) online. And it worked. It was a bit strange that the new wallet also received the funds as well (which I discovered later on)  so I didn't need to transfer the funds from the old wallet to the new wallet. I have no idea how that's even possible. In any case I deleted the old wallet file afterwards.
**I just want to point out both wallets were never online at the same time.
It would be nice if the devs could create a function to dump + import addresses between wallet files.