Because we are currently running the application on 2 domains (app.coaching.com and app.coaching.) Safari needs to accept cross-site tracking for the application to work properly. This function is disabled as default in Safari 6.
Enable Third Party Cookies (Safari 5.1 and later)
Open Safari and in the top left corner of your screen click on Safari and select Preferences.
In the preference window select the Privacy option and under Website tracking uncheck the Prevent-cross-site tracking option.