When I erase something, it automatically smooths it out, similarly to the "Smooth" setting on the Pencil tool at max power. It is especially jarring for places where fine, narrow, irregular strips need to be erased - they lose almost all of their details.
How can I eliminate this unwanted smoothing?
i think you'll need to do that kind of detail work in illustrator or photoshop and then import into flash.
Well, it would be hard since my project is an animation.
It would mean every frame I need corrected, I pass it through Illustrator/PS then back to Flash.