explicitvariables weirdness

[Mark Swindell]

Over the past couple days I've been encountering a frustrating  
behavior in that when I go to save a stack script, I'm greeted with  
the following error message:

Type	Chunk: can't create a variable with that name (explicitVariables?)
Object	FF Stack
Line		put "multiplication addition division subtraction" into  
theCardsToChange
Hint		theCardsToChange

explicitvariables is set to false, but I still get this error  
message.  I've saved the script hundreds of times before without  
issue... only in the past couple of days has this come up.  If I  
dismiss this error, another local variable error comes up in its  
place. Any ideas?

Thanks
Mark