I was using 1.4.5 and there were no radio buttons. I updated to 1.5rc4 and it is still the same. There are Checkboxes and Multiple Choice, but no radio buttons. Checkboxes and multiple Choice both do the same thing, contain the same default values and have the same properties on the admin side.
Doing a search of the forum and a google search shows me posts talking about radio buttons, so perhaps I have a conflict with another plugin that allows Gravity Forms to work just fine except for no radio buttons.
Any ideas? I swear I'm missing something pretty obvious since there are no other posts with people asking about it. Sorry if this seems like a entirely boneheaded question.