1. The Facebook popup displays an error
In most cases, you have forgotten to follow the step 5 of this tutorial. It’s VERY important.
In other cases, there are mistakes on step 4. For instance, you site is “www.mysite.com” but you have fill the fields with “mysite.com” which is very different. Don’t forget to add (or remove) the “www” before your domain.
2. Facebook share displays the quiz title, not results
I’m working on it. Facebook changes the rule a few weeks ago (read more), and it’s now very hard to customise the Facebook sharebox. I’m on it! Don’t worry.