there's a http too much in your Signature dividendrippler Link
is there a Cheatsheet for that Ripple IOU Stuff, it's too complicated
haha. Never noticed that, thank you. Off topic: I had a private key in my signature (with bitcoins on it) for months and no one took them, when coins got to $200 each I decided to redeem myself. It was base64, so it wasn't obvious. Wanted to prove that no one looks at the signatures, guess I'm guilty of not checking my own sig.
Cheatsheet - its not complicated once the idea is understood. Start out trusting only Bitstamp for USD and BTC, and go from there.