Trouble with OpenID login within iframe in Safari

I've had users using my site http://dealclippings.com report that they aren't able to login. I'm struggling to determine the cause and was wondering if anyone could help me debug the p开发者_开发技巧roblem.

---

Turns out that as a security measure in OpenID, you can't authenticate in an iframe. It prevents the web site from maliciously catching your password or tricking you in other ways.

Good to know!