In fact there is no need to back up the wallet.dat after each transaction. If the change addresses are missing, there is a way to solve it.
1) Nobody claimed that you need to do that.
2) There's no way to solve it if your backup does not have the new keypool. Many things could have gone wrong with the old OP. I don't see why you would care now? Seems suspicious.
Hi teknonix I had a situation similar as I lost about 2 to 5,000 btc but I still have my wallet file. Is there anyway you can help me get my bitcoin back. I can give you tip . Please say.
I find this very hard to believe. Proof?