Last night in the temple I was fighting hill giants when I cast fireball and its trailing graphics remained until I won the fight and opened a door. (Copy and paste this link into your browser's address bar since clicking it directly won't work.) Also, Will-o'-Wisps should be vulnerable to magic missile despite the spell having spell resistance.because of the WoW text. -EE
I dunno, first time I tried the wisp battle I just thought there was something drastically wrong, I had all of ONE player that could hit them on anything less than natural 20 and my spells did nothing... later when I understood the engine better (how to use flanking / not fire over each other etc) I did better but it is a surprisingly tough encounter imho. [Edit: should add something relevant! Let me say yes, I have seen that happen before, at that very room if I am not mistaken.]