I had one person recently who disagreed with only allowing the correct spelling of a name as a fill in the blank answer. Their reasoning was that the real spelling is never shown in the actual show and this wasn't a spelling test type of quiz.
However, I had to point out there are numerous official sites with the correct spelling (and that's why the quizzes aren't timed, so you can look it up). Also, (using an example here) Jenn is not the name of the woman, Jen is. Therefore, saying that Jenn rode her bicyle is wrong because it was actually Jen who did so.
Another thing I'd like to point out is for quizzes already online. Sometimes, a FITB question isn't working as fewer than 10-15% of the players are getting it wrong. This is the perfect sign that your FITB question is either too tricky or just plain too hard and should be switched to T/F/Y/N or multiple choice. Even though it may be perfectly formed as a fill in the blank question, such low 'correctness' scores shows that something's going on there that you may not be aware of.
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"Without the darkness, how would we see the light?" ~ Tuvok
Editor for Television Category