Ok I can definitely confirm it is a problem with 3.5.1 with the official Frontend version 1.1. Its due to a bug in the checkSubmit function in wpuf.js. I rewrote this in the development version some time back due to similar bugs and this seems to solve the problem. Simply update wpuf.js with the updated version of checkSubmit below
checkSubmit: function () {
var form = $(this);
//Save tinymce iframe to textarea
if (typeof(tinyMCE) != "undefined") {
tinyMCE.triggerSave();
}
$('#wpuf-info-msg').html(' ');
$('*',this).each(function() {
if( $(this).hasClass('wpuf-invalid') ) {
$(this).removeClass('wpuf-invalid');
}
});
var hasError = false;
$(this).find('.requiredField').each(function() {
var el = $(this);
if(jQuery.trim(el.val()) == '') {
//Highlights closest visible container.
//Still slight bug in tinyMCE editor when submitted when display tab is "HTML"
//In this case the "Visible" tab won't be highlighted but this is very insignificant.
el.closest(':visible').addClass('wpuf-invalid');
hasError = true;
} else if(el.hasClass('email')) {
var emailReg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
if(!emailReg.test($.trim(el.val()))) {
el.closest(':visible').addClass('wpuf-invalid');
hasError = true;
}
} else if(el.hasClass('cat')) {
if( el.val() == '-1' ) {
el.closest(':visible').addClass('wpuf-invalid');
hasError = true;
}
}
});
if( ! hasError ) {
$(this).find('input[type=submit]').attr({
'value': wpuf.postingMsg,
'disabled': true
});
return true;
}
$('#wpuf-info-msg').html('<div class="wpuf-error">Required field(s) empty.</div>');
$('#wpuf-info-msg').fadeTo(0,1);
return false;
},
