romul/spree-print-invoice — pull request #1 by jumph4x (2012-03-07 18:26:55+00:00)
Title: Psych::SyntaxError: couldn't parse YAML at line 5 column 25 in spree-print-invoice-2fe9d04a0c40/config/locales/en.yml

Simple as that.

Under certain conditions (when using Psych with libYaml) it treats the \O and \P as invalid input.