I just upgraded to the most recent wordpress and VF builder, and I now receive the below error message on the top of my form...
Oops! Missing Fieldset
If you are seeing this message, it means you need to add a Fieldset to the beginning of your form. Your form may not function or display properly without one.
I did not receive this error with previous versions. This is a very important fix for me as this is critical to my business.