Can I remove the passphrase from my Bitcoin Wallet? I'm using the standard Mac Bitcoin client and I added a passphrase. I'd like to remove that passphrase. Is that possible?
You can dump your old wallet to a backup file, restart the program to generate a new wallet and import your old wallet into it.

Assuming you are in the directory where your wallet file is located, using the command line that would look like this:

bitcoind walletpassphrase "xxx" 60
bitcoind dumpwallet "wallet.dat.backup"
bitcoind stop
mv wallet.dat wallet.dat.old
bitcoind -daemon
bitcoind importwallet wallet.dat.backup


I would be interested in a less dirty way, if anybody knows one.