gnus-mime-display-multipart-related-as-mixed

gnus-mime-display-multipart-related-as-mixed is a variable defined in `gnus-art.el'.
Its value is

nil

Documentation:
Display "multipart/related" parts as "multipart/mixed".

If displaying "text/html" is discouraged (see
`mm-discouraged-alternatives') images or other material inside a
"multipart/related" part might be overlooked when this variable is nil.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 22.1 of Emacs.