Some months ago, I installed bitcoin-qt on Ubuntu, created a wallet and address, then transferred funds to it from MtGox. I let it sync up for over 10 days, but it never fully synced. So I exported a
wallet.dat file, then uninstalled bitcoin-qt.
Today, I installed MultiBit and imported the
wallet.dat file. It is empty. It has one address which shows no transactions or balance on blockchain.info. The wallet in bitcoin-qt had several addresses.
What happened? Is there anything I can do to restore the files containing my bitcoin?