Perhaps the best quote I've seen in a long time: "These kinds of attacks are common in smart contracts because many developers do not put in the legwork to define security properties for their code..." I'm sure that this would apply to many kinds of software, not just smart contracts.

This is from an article on a hacker that stole money by altering a smart contract. In this case, tokens used to replace parts of the contract overwrote other tokens, which allowed a smart hacker to change prices and make more money. Or steal it, with a contract change, I don't know that theft is actually the correct term.

Read the rest of No-so-smart Contracts