How do I view the "change" addresses in my wallet? listreceivedbyaddress 0 true doesn't work
The standard client always sends your Bitcoins back to a new address. If you want to figure out which address it went to, you can use gettransaction to view your transaction details (you got the ID when you issued the transaction), and check its outputs. The output that is not one of the addresses that you sent money to is your change address.