Comment 2 for bug 1276384

My own inexpert internet sleuthing suggests that the problem at least in part is related to the version of celery on Trusty? My current version is 3.1 something, when all I see in the ppas are 2.5 something, and there's an error in the error log for celery that says it can't import module abstract, which apparently has been renamed as of celery 3.0. (http://docs.celeryproject.org/en/latest/whatsnew-3.0.html)