$this-relation was being used in other context, I created new properties "thematicAreaRelations" and "geographicRegionRelations"

editAction.class.php.diff

--- editAction.usask.class.php  2011-04-15 15:34:34.168164792 +0200
+++ editAction.class.php        2011-04-15 15:32:01.982147000 +0200
@@ -102,7 +102,7 @@
         $criteria->add(QubitTerm::TAXONOMY_ID, QubitTaxonomy::THEMATIC_AREA_ID);

         $value = array();
-        foreach ($this->relations = QubitObjectTermRelation::get($criteria) as $item)
+        foreach ($this->thematicAreaRelations = QubitObjectTermRelation::get($criteria) as $item)
         { 
           $value[] = $this->context->routing->generate(null, array($item->term, 'module' => 'term'));
         }
@@ -127,7 +127,7 @@
         $criteria->add(QubitTerm::TAXONOMY_ID, QubitTaxonomy::GEOGRAPHIC_REGION_ID);

         $value = array();
-        foreach ($this->relations = QubitObjectTermRelation::get($criteria) as $item)
+        foreach ($this->geographicRegionRelations = QubitObjectTermRelation::get($criteria) as $item)
         { 
           $value[] = $this->context->routing->generate(null, array($item->term, 'module' => 'term'));
         }
@@ -263,7 +263,7 @@
           $value[$resource->id] = $filtered[$resource->id] = $resource;
         }

-        foreach ($this->relations as $item)
+        foreach ($this->thematicAreaRelations as $item)
         { 
           if (isset($value[$item->termId]))
           {
@@ -294,7 +294,7 @@
           $value[$resource->id] = $filtered[$resource->id] = $resource;
         }

-        foreach ($this->relations as $item)
+        foreach ($this->geographicRegionRelations as $item)
         {