diff --git a/application/forms/AddNodeForm.php b/application/forms/AddNodeForm.php
index 9cf63ae..0b27a35 100644
--- a/application/forms/AddNodeForm.php
+++ b/application/forms/AddNodeForm.php
@@ -339,7 +339,7 @@ class AddNodeForm extends QuickForm
             }
         }
 
-        natsort($list);
+        natcasesort($list);
         return $list;
     }
 
diff --git a/application/forms/EditNodeForm.php b/application/forms/EditNodeForm.php
index 8ac4a52..cc7926c 100644
--- a/application/forms/EditNodeForm.php
+++ b/application/forms/EditNodeForm.php
@@ -374,7 +374,7 @@ class EditNodeForm extends QuickForm
             }
         }
 
-        natsort($list);
+        natcasesort($list);
         return $list;
     }
 
diff --git a/library/Businessprocess/BpConfig.php b/library/Businessprocess/BpConfig.php
index 4f1bc73..5b20056 100644
--- a/library/Businessprocess/BpConfig.php
+++ b/library/Businessprocess/BpConfig.php
@@ -368,14 +368,14 @@ class BpConfig
      */
     public function getRootNodes()
     {
-        ksort($this->root_nodes);
+        ksort($this->root_nodes, SORT_NATURAL | SORT_FLAG_CASE);
         return $this->root_nodes;
     }
 
     public function listRootNodes()
     {
         $names = array_keys($this->root_nodes);
-        sort($names);
+        natcasesort($names);
         return $names;
     }
 
@@ -665,7 +665,7 @@ class BpConfig
             $nodes[$name] = $name === $alias ? $name : sprintf('%s (%s)', $alias, $node);
         }
 
-        natsort($nodes);
+        natcasesort($nodes);
         return $nodes;
     }
 
diff --git a/library/Businessprocess/BpNode.php b/library/Businessprocess/BpNode.php
index 8f97e55..9441619 100644
--- a/library/Businessprocess/BpNode.php
+++ b/library/Businessprocess/BpNode.php
@@ -426,7 +426,7 @@ class BpNode extends Node
 
     public function setChildNames($names)
     {
-        sort($names);
+        natcasesort($names);
         $this->childNames = $names;
         $this->children = null;
         return $this;
@@ -446,7 +446,7 @@ class BpNode extends Node
     {
         if ($this->children === null) {
             $this->children = array();
-            natsort($this->childNames);
+            natcasesort($this->childNames);
             foreach ($this->childNames as $name) {
                 $this->children[$name] = $this->bp->getNode($name);
                 $this->children[$name]->addParent($this);