User blog comment:Kangsbro/Editing/@comment-60868-20101218181929/@comment-122657-20101220174323

Wikia does have a series of spam filters that essentially don't allow certain characters to be added (characters such as characters in extended alphabets and such). This is usually to deter the addition of spam links or copied and pasted bad text.

Without specific information about what was trying to be added where, it's hard to say exactly why this happened.