I have the same issue, when I attempt to use the brush tool it hangs until I select the arrow selector. I have reinstalled to no avail. The pen works fine in every other adobe application and every other application I have except Flash. I have a Samsung Series 7.
The latest wacom driver seems to fix the flash drawing bug but now my touch screen doesn't work. I'm going to assume that this is in fact a wacom issue. Thanks for your speedy response, Adobe!