gnus-make-format-preserve-properties

gnus-make-format-preserve-properties is a variable defined in `gnus-spec.el'.
Its value is

nil

Documentation:
*If non-nil, use a replacement `format' function which preserves
text properties. This is only needed on XEmacs, as Emacs does this anyway.

You can customize this variable.

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