Looks like Magento will be releasing updated version of the SUPEE 8788, to fix the SUPEE 1533 compatibility. I am not sure if its good idea to apply manually fixes right now. Manual changes may compromise future patch updates. Would like to hear your thoughts.
It has been confirmed by Magento Community Manager. As oct 13, 3pm EST.. all patches for versions below 1.9 are deleted from download list https://www.magentocommerce.com/download?_ga=1.236497153.1889606568.1445610645 See post: https://community.magento.com/t5/Security-Patches/SUPEE-8788-AND-SUPEE-1533-Incompatible-Hunk-error/m-p/50514/highlight/false#M1805