From https://en.bitcoin.it/wiki/Wallet
what's default key and reserve keys ?
Quote
The original Bitcoin client wallet file is named wallet.dat and contains[1]:
keypairs for each of your addresses
transactions done from/to your addresses
user preferences
default key
reserve keys
accounts
a version number
Key pool
keypairs for each of your addresses
transactions done from/to your addresses
user preferences
default key
reserve keys
accounts
a version number
Key pool
what's default key and reserve keys ?
Have you checked the thread https://bitcointalksearch.org/topic/wallet-importexport-bitkeys-format-4448, which the footnote [1] links to?