Index: openacs-4/packages/acs-subsite/www/shared/portrait-bits.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-subsite/www/shared/portrait-bits.tcl,v
diff -u -r1.10.2.5 -r1.10.2.6
--- openacs-4/packages/acs-subsite/www/shared/portrait-bits.tcl	5 Jan 2016 15:29:27 -0000	1.10.2.5
+++ openacs-4/packages/acs-subsite/www/shared/portrait-bits.tcl	6 Jun 2016 18:28:01 -0000	1.10.2.6
@@ -73,6 +73,7 @@
         # file by the if-clause above.
         #
         if {[file exists $filename]} {
+            ns_setexpires 86400 ;# 1 day
             ad_returnfile_background 200 $itemInfo(mime_type) $filename
         } else {
             ad_log warning "cannot show portrait with item_id $item_id for user $user_id "