Firstbits not found

[soy]

Okay, I sent 1btc from MtGox to an address on 2/22/2013.  Not sure what that was about I went to blockchain.info and punched in the address.  The blockchain.info response was "Firstbits not found".

What does this mean?

Edit: It means I didn't enter the address properly. 

[DeathAndTaxes]

It means what you entered wasn't a complete bitcoin address (last digit cut off?) and because it was too short blockchain.info was looking for a first bit address that matches it.

The other possibility is that blockchain.info is broke!

[soy]

I found it is an old address of a Bitcoin-qt that I had sent the btc to so as to test how the system worked back then.  When I found it, then did a copy and paste, the address was found by blockchain.info.  So, although I copied the address what I thought was accurately from a print-out of a MtGox page last year, I must have misread a digit or letter.  Did that read and type in twice, both apparently wrong!

[Leogheo]

Can they be just lost?