in [Success] 1 April Merge / 0.64pre on ubuntu12.04 like :
First : How to upgrade libcairo2 and libcairo2-dev up to 1.12 if not present in my repository ?
Adding “quantal main” (ubuntu 12.10) repository can be a solution.Take care to select manually only the .deb needed - libcairo2 and dependencies (or this will be the road to full system migration) - after this little update ,7 .deb or something like, don’t forget to disabled or suppress “quantal main” repository to preserve your system! .
Did you try that (no maintainable) way ?