Index: openacs-4/packages/news/lib/news.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/news/lib/news.tcl,v
diff -u -r1.3.2.3 -r1.3.2.4
--- openacs-4/packages/news/lib/news.tcl	19 Aug 2021 17:22:58 -0000	1.3.2.3
+++ openacs-4/packages/news/lib/news.tcl	23 Nov 2023 11:45:17 -0000	1.3.2.4
@@ -6,6 +6,12 @@
     publish_body:allhtml
     creator_link:html
     publish_format:notnull
+} -validate {
+    valid_mime_type -requires {publish_format:notnull} {
+        if { ![ad_html_text_convertible_p -from $publish_format -to text/html] } {
+            ad_complain [_ acs-tcl.lt_name_is_not_valid [list name publish_format]]
+        }
+    }
 }
 
 set publish_body [ad_html_text_convert -from $publish_format -to text/html -- $publish_body]