I ran into this in an application we have at work. I've been going
through the code using VarScoper to make sure variables in the
application's CFC (not the Mach-II files) were properly var scoped.
I'm not sure if this is the cause, but it's the most likely culprit.
http://varscoper.riaforge.org/
This won't catch anything that is specifically placed into the
variables scope when it shouldn't be, but it'll catch everything else.
-- Adrian