I have a form with conditional (visibility) rules, and it works fine in FireFox and Chrome, but the rules don't work in Internet Explorer 7 or 8. Please help!
In some cases, the problem originates with template code. For example, a number of templates from RocketThemes have an advanced option to customize the look of form elements. Try disabling that feature (in the Template Manager section) and see if that corrects the issue.
(Thanks to user gtmaniak for the suggestion!)