I’m experiencing the same problem that was reported in this post (http://formidablepro.com/help-desk/conditional-logic-issue/). I’m following the last direction in that post and have exported and zipped my form and attached it here.
I am using some HTML, but really only simply “<p> </p>” in existing fields and some HTML text blocks inserted in the form. There seemed to be a hint that those could be the cause of the problem. Wondering if and how this got resolved.