I have a large client site that we recently updated from 1.6.8 with the core hacked, we are now running a clean unhackec version of 1.7.1. Since the update all of the advanced conditionals no longer work, this includes if:else and if with statements AND or OR. Simple conditionals work just fine as do PHP conditionals. The site in question is fairly large (400 or so templates) so I do not fancy going through every template and changing all the conditionals.
Any ideas?
I can provide site access via PM.