Version 4.6.0

system/Helpers/Form/Matrix.php

@@ -393,7 +393,7 @@ class _Matrix extends \IPS\Helpers\Form
 						}
 						
 						/* If the "check all" box was checked, set it to TRUE */
-						if ( $element instanceof Checkbox and isset( \IPS\Request::i()->__all[ $columnName ] ) )
+						if ( $element instanceof Checkbox and isset( \IPS\Request::i()->__all[ $columnName ] ) and ! $element->options['disabled'] )
 						{
 							$element->value = TRUE;
 						}