Comment 9 for bug 694242

Well I can't complain too much, 'Uninstall' did not leave the boot manager menu in an inconsistent state, so I did not need to follow cleanup steps in http://askubuntu.com/questions/239245/ubuntu-winboot-wubildr-mbr-error

Still, title of the bugreport says enough. WUBI should either warn users of potential for failure (save me a lot of download time) or provide support.