Rebuilds seem to be failing on ppc. http://extras64.linux.duke.edu/failed/development/unison/2.10.2-6/ppc/unison-2.10.2-6.failure.log
Till lablgtk gets built (its missing in ppc, and I think on all arch's), this can't get resolved. Bug dependecy on #156230
This has been built 2.10.2-7