odd glitch in scroll recital

Earlier today I created a scroll with these spells in this order:

v1 curse
v2 blindness
v3 weaken
v4 slow

For some very bazare reason the only spell on the scroll that casts correctly when recited is blindness. Any thoughts?

Well, thanks to an assist from Daos, this has been solved. Seems the obj_cast_spell function in magic.cpp was missing a case handler for TAR_MOB_OFFENSIVE which essentially had the scrolls react as if any spell flagged as TAR_MOB_OFFENSIVE was a blank field when the scroll was recited. Hopefully anyone else that runs into this catches this fix and adds the missing case in magic.cpp