Just quick post how to use acts_as_flying_saucer with rails 3.1 and Heroku. I was testing acts_as_flying_saucer with rails 3.1.It is working fine so far. but when i have added external style sheet it was hanging on dev mode. and later on i figure out it is external style sheet causing an issue. So i precomplied css and then try to generate pdf it is working. Now it is time to test on heroku. I am using cedar stack and ruby …