If you found an error using a GITTA lesson, have critics about an available lesson, would like to suggest improvements, found animations that don't work etc., please submit it using the form below! The responsible person will fix the error. If you would like to be contacted after your issue is fixed, you will need to create a Sourceforge account and login at Sourceforge.net before you submit a bug!
You can also browse the list of submitted errors before submitting one yourself. Maybe your question has already been answered.