Errors in Quantum Cryptography?

Interesting research from Sweden - apparently researchers were able to unexpectedly find a flaw in quantum cryptography, the holy grail of 100%, bullet-proof encryption!

The researcher quotes - "We didn't expect to find a flaw". Makes one wonder if there is any technology that can claim it.

I think there are no foolproof solutions, only fools (maybe too strong a word, but the rhyming was too good to pass up!) who believe so...