We'll respond shortly.
I’d like to run a search in Tracker for stories that are not marked (labelled) “blocked”. How?
File to import not found or unreadable: compass/css3/box-shadow. Load path: Sass::Rails::Importer(/app/app/assets/stylesheets/email.scss)
Possibly, your gem is in the assets-group, not the production-group. This means it will not be loaded on production. Try moving it to production.
i.e., through herokusan but not by doing heroku maintenance:on.
May be a bug in the heroku gem.