Finding "lost" bitcoins Bitcoins sent from Mt. Gox, but never have appeared in my account. I have the block # of the transfer.

How can I trace the deposit or find them within my account?
To look up the transaction go to blockchain.info or blockexplorer.com and type the transaction number in the search box. You will see the sender address, the destination address, the block number where the transaction was included, among other info.

Please confirm that your bitcoin client has downloaded all the blocks. You can see a number in the bottom right corner, which should match the most recent block (the current number is 153881, you can find this information in the websites I mentioned). See this question for more information.