Hit the break to find out what character gave Twitter so much trouble.
I can't say I'm surprised at all. Twitter has been poorly implemented from the beginning and this isn't even the first time an XXS bug has been exploited. These exploits are so simple that it just seems unreal for such a widely used service to fall victim to this twice. All they do is convert tweets into hyperlinks, that is their service, and yet they haven't even got that right. Maybe the Web isn't the place for Twitter to be.