#561892 by dereine: Unchecking "rewrite this field" but leaving a value caused field to be rewritten anyway.

#554000 by killes: Preview checking wrong flag for preview state causes feeds to display incorrectly when embedded.

#512650 by sdboyer: Multiple many to one arguments on the same relationship were not relationship safe.

#540122 by stella: Attachment displays should attach even if arguments caused the primary display to abort.