silverstripe/silverstripe-framework — pull request #2429 by chillu (2013-09-18 12:32:01+00:00)
Title: Form errors in LeftAndMain response negotiation

The session key for form errors changed from "Form_EditForm" to "CMSForm_EditForm",
causing a mismatch. See https://github.com/silverstripe/silverstripe-framework/pull/2084/files#r6338249 for discussion