Index: openacs-4/packages/wp-slim/www/serve-presentation-revision.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/wp-slim/www/serve-presentation-revision.tcl,v
diff -u -r1.9 -r1.10
--- openacs-4/packages/wp-slim/www/serve-presentation-revision.tcl	12 Sep 2013 20:47:20 -0000	1.9
+++ openacs-4/packages/wp-slim/www/serve-presentation-revision.tcl	27 Jun 2015 20:34:42 -0000	1.10
@@ -57,6 +57,6 @@
     and r.revision_id = pb.id
 }   
 
-set context [list [list "$subsite_name/presentation-top?[export_vars -url {pres_item_id}]" "$pres_title"] "[_ wp-slim.One_Revision]"]
+set context [list [list [export_vars -base $subsite_name/presentation-top {pres_item_id}] "$pres_title"] "[_ wp-slim.One_Revision]"]
 
 ad_return_template