Index: openacs-4/packages/openacs-bootstrap3-theme/resources/masters/plain-master.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/openacs-bootstrap3-theme/resources/masters/plain-master.tcl,v
diff -u -r1.3.2.1 -r1.3.2.2
--- openacs-4/packages/openacs-bootstrap3-theme/resources/masters/plain-master.tcl	9 Feb 2020 15:45:31 -0000	1.3.2.1
+++ openacs-4/packages/openacs-bootstrap3-theme/resources/masters/plain-master.tcl	10 Oct 2020 09:06:31 -0000	1.3.2.2
@@ -38,9 +38,10 @@
 template::head::add_meta \
     -name "viewport" \
     -content "width=device-width, initial-scale=1"
-template::head::add_meta \
-    -content "text/css" \
-    -http_equiv "content-style-type"
+#
+# The W3C validator (Nu HTML Checker) throws an error on meta-tag content-style-type
+#
+#template::head::add_meta -content "text/css" -http_equiv "content-style-type"
 
 if {[info exists context]}      { set context_bar [ad_context_bar {*}$context]}
 if {![info exists context_bar]} { set context_bar [ad_context_bar] }