* gnus-agent.el (gnus-category-mode): Use gnus-run-mode-hooks.

* gnus-agent.el (gnus-category-mode): Use gnus-run-mode-hooks.

* gnus-art.el (gnus-article-mode): Use gnus-run-mode-hooks.

* gnus-cus.el (gnus-custom-mode): Use gnus-run-mode-hooks.

* gnus-eform.el (gnus-edit-form-mode): Use gnus-run-mode-hooks.

* gnus-group.el (gnus-group-mode): Use gnus-run-mode-hooks.

* gnus-kill.el (gnus-kill-file-mode): Use gnus-run-mode-hooks.

* gnus-salt.el (gnus-tree-mode): Use gnus-run-mode-hooks.
(gnus-carpal-mode): Ditto.

* gnus-srvr.el (gnus-server-mode): Use gnus-run-mode-hooks.
(gnus-browse-mode): Ditto.

* gnus-sum.el (gnus-summary-mode): Use gnus-run-mode-hooks.

* gnus-util.el (gnus-run-mode-hooks): Save current buffer.