Hope you can help. I'll e-mail you a link to the URL as it's being tested and don't want to reveal it publicly yet, unless I can move it to a testing server on my own site.
Validation does work when you take the UE extension off. Indeed, it did work fine before I put UE on. I had the form mailed via a formmail script but took it off as it meant altering the code manually in Form Builder. I discovered that this caused serious problems rendering FB unusable, but that's another story.....
Anyway. I decided to use UE as I have it as part of the extensions library and thought that's what it's for, after all. (Doh!!!). It's only once I started using UE that the validation problems started. To cut it short, FB worked fine before adding UE.
In your reply you said "The other thing that may be a quick fix is to ensure all the UE includes and attributes occur after the validations." I'm not quite sure what you mean by that. How can I tell if this is the case?