Good news: finamathmatics' wallet was succesfully recovered.

Indeed, all of his wallets, including the backups, were corrupted. I don't know what caused that, but I have no reason to believe that there is any problem with the wallet software itself.

Exporting the private key was not possible btw. And also --salvagewallet didn't do the trick this time. But those were good tips, thank you.

I'll reveal things later in Slack. But first, because he did share his wallet, finamathmatics needs to move his funds to a new wallet and be 100% safe again.

Blockchain is still slow by the way. Will improve with time.