Is it ethical to withdraw a CS conference paper after being accepted, but before the final version is due (because of authorship disputes). What other consequences would there be (like re-submitting to other conferences if withdrawal is is successful)?
These sort of things do occur and are of valid concern. It would be best to withdraw your paper with a kind apology note to the conference committee. There is not an unethical conduct as your reason should be perfectly valid and you have no gain in this act.