If you look at my app here: http://quiet-brushlands-5712.herokuapp.com/, close to the button is an icon, a glyphicon. But it\'s not appearing on heroku. locally it show as nicel
In config/environments/production.rb
config/environments/production.rb
Change config.assets.compile = false to config.assets.compile = true
config.assets.compile = false
config.assets.compile = true
(and then don't forget to commit and push to heroku)
Worked for me...