in the users_registration.php file, change:
var sprytextfield8 = new Spry.Widget.ValidationTextField("sprytextfield8", "none", {validateOn:["blur"], minChars:5, maxChars:10});
to:
var sprytextfield8 = new Spry.Widget.ValidationTextField("sprytextfield8", "none", {validateOn:["blur"], minChars:4, maxChars:10});
you will also need to edit the users_Profile.php page, change:
var sprytextfield7 = new Spry.Widget.ValidationTextField("sprytextfield7", "none", {validateOn:["blur"], minChars:5, maxChars:10});
to:
var sprytextfield7 = new Spry.Widget.ValidationTextField("sprytextfield7", "none", {validateOn:["blur"], minChars:4, maxChars:10});