Magic bug: Prismatic Spray causes CDT

Casting prismatic spray in Aenea is causing NWN to crash to desktop for me.  I'll start to cast, I'll see the initial casting VFX, but then I instantly crash when the spell's specific VFX is supposed to fire off.

I tested the same spell with a wizard character in a SP module... no crash there, and then tested with a wizard and the same spell on another server.  No crash there either.

It's specific to Aenea's version of the spell

(and prismatic spray/color spray are to Agamemnon as disintegrate/flesh to stone are to Crideas  )

NPCs casting this spell also causes a CDT :-/