tomchristie/django-rest-framework — pull request #101 by yandy (2011-12-30 14:58:12+00:00)
Title: change the key name "field-errors" to "field_errors".

"-" is not allowed as a part of key name in some language such as "Javascript".
javascript cannot handle JSON which returned by djangorestframework when form validation failed
So it may be a bad idea to use "-" in key name.