Foren / Cotonti / Support / possible small bug report

Still the user can register with a single quote in the name... The systems lets them..
So that's my problem right now. A single quote is often used in names in the NL.

Is there a way to prevent the quote in a proper manner (hooks or plugins).
Or should I just hack it (i do not want that off course)?

Is this a point for te next Cotonti release ?

thnx