Sorry if this is a dumb question which makes me look like an idiot, but I have been unable to extract the private keys from the wallet.dat file. I've been trying to use pywallet.py, but each time I do, I get the following:

        {
            "addr": "1ktfy4LrHRQ2bmLauCdstbgGJEpPa8Qm6",
            "n": 101,
            "nTime": 1378059316,
            "nVersion": 80300,
            "public_key_hex": "03e9795fcadcba658da6550517bc239c8bcd86d00741c527533ffb22ac4474eb2c"
        }

There is no privkey section. When I try to go through the web interface to do keydump, I get "File not written". In fact all I can get to work is wallet dump. All of the other commands cause errors.

Any idea what might be causing this?