Index: openacs-4/packages/acs-templating/tcl/head-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-templating/tcl/head-procs.tcl,v
diff -u -N -r1.32 -r1.33
--- openacs-4/packages/acs-templating/tcl/head-procs.tcl	25 Apr 2018 07:20:18 -0000	1.32
+++ openacs-4/packages/acs-templating/tcl/head-procs.tcl	1 May 2018 08:24:50 -0000	1.33
@@ -626,7 +626,7 @@
 
     if {[info exists headers]} {
       switch -- $direction {
-        outer {set headers [concat [list $values] $headers]}
+        outer {set headers [linsert $headers 0 $values]}
         inner {lappend headers $values}
         default {error "unknown direction $direction"}
       }
@@ -672,7 +672,7 @@
     if {[info exists footers]} {
       switch -- $direction {
         outer {lappend footers $values}
-        inner {set footers [concat [list $values] $footers]}
+        inner {set footers [linsert $footers 0 $values]}
         default {error "unknown direction $direction"}
       }
     } else {