The scenario is simple, have an SWC that contains some TLF.
include the SWC in an fla and try to create an object of a class in the SWC, it will blow up.
TypeError: Error #1034: Type Coercion failed: cannot convert flash.display::MovieClip@22486f21 to fl.text.TCMText.
at flash.display::Sprite/constructChildren()
at flash.display::Sprite()
at flash.display::MovieClip()
Currently there are no real solutions I can find that will help.