Can't edit form fields

For some reason I cannot edit the form fields on a newly created form in a fresh WP install. This is the first time I have ever experienced this issue.

I have access to all of the settings in the first form field - the one with the form name, etc - but all subsequent fields are locked. They change color when hovered over, but clicking the edit option does nothing. I can delete the fields, however.

I am using Thesis 1.8.5 w/ WP v.3.4.2. I switched themes to TwentyTen and de-activated all plugins, but the problem persists.

Any ideas?

I can create new forms, the forms will submit -- I just cannot edit any of the form field titles, descriptions, settings, etc...

I've tried in Chrome, Firefox & Safari, all with the same result. I've cleared the cache multiple times, still no change.

The Duplicate & Delete options on the form field editors work just fine. the Edit option is the only one that is "dead" when clicked.