I've noticed this "bug?". When Saving user scores option is checked in Slick Quiz Default options to YES, the form field for entering name is NOT visible in Firefox 27.0.1. (latest). In Chrome 33.0.1750.117 (latest) it is ok.
I tried to restart Firefox in Safe mode (in defaults, without all add-ons), but the field is still invisible.
I don't know, if that issue happened after today's Slick quize and WP 8.1 update or it is just the Firefox version bug, but before that it worked properly in Firefox.
Have you got an idea how to get it fixed?
Thank you for the nice plugin and this support.