Index: openacs-4/packages/xowiki/tcl/xowiki-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/xowiki-procs.tcl,v
diff -u -r1.485.2.28 -r1.485.2.29
--- openacs-4/packages/xowiki/tcl/xowiki-procs.tcl	5 Jun 2016 12:45:53 -0000	1.485.2.28
+++ openacs-4/packages/xowiki/tcl/xowiki-procs.tcl	19 Sep 2016 13:48:23 -0000	1.485.2.29
@@ -1392,12 +1392,16 @@
       parent_id
       publish_status
       page_template
-      instance_attributes
       assignee
       state
     }} {
       ::xowiki::update_item_index -item_id [my item_id] -$colName $value
     }
+    if {[::xo::dc has_hstore] 
+        && [[my package_id] get_parameter use_hstore 0] 
+        && $colName eq "instance_attributes"} {
+            ::xowiki::update_item_index -item_id [my item_id] -hstore_attributes [my instance_attributes]
+    }
   }
 
   ad_proc update_item_index {
@@ -1406,7 +1410,6 @@
     -parent_id
     -publish_status
     -page_template
-    -instance_attributes
     -assignee
     -state
     -hstore_attributes
@@ -1415,13 +1418,13 @@
     Helper function to update single or multiple fields of the
     xowiki_form_instance_item_index. Call this function only when
     updating fields of the xowiki_form_instance_item_index in cases
-    where the standard API based on save and save_use canot be used.
+    where the standard API based on save and save_use can not be used.
 
   } {
     foreach var {
       package_id parent_id
       publish_status page_template
-      instance_attributes assignee state
+      assignee state
     } {
       if {[info exists $var]} {
         xo::dc dml update_xowiki_form_instance_item_index_$var [subst {