As reported on a few other sites, it is reported that Nate True has gone “rogue” and posted the iPhone 1.1.3 Jailbreak without the Dev teams permission.

http://cre.ations.net/blog/post/iphone-113-jailbreak-released

Link that talks about the controversy

To start, you must have an iPhone at 1.1.1 or 1.1.2 and jailbroken.  If you upgraded to 1.1.3 right away, this won’t work (yet).

See modmyifone.com for a whole lot of chatter about this topic.