Does that mean if I post a btc address you'll send me 50btc? ;-)

I found it while establishing the block chain in a normalized db.  Where I thought hash values shouldn't (unless collision) be used twice they were given a unique index.

This leads me to my next question.  How strong is the input sanitizing of the block protocol in the bitcoind application? or another way to ask is, more specifically how did this happen?

Thanks for your time.