Index: library/Zend/View/Helper/FormSelect.php
===================================================================
--- library/Zend/View/Helper/FormSelect.php	(revision 24537)
+++ library/Zend/View/Helper/FormSelect.php	(working copy)
@@ -70,6 +70,9 @@
         // force $value to array so we can compare multiple values to multiple
         // options; also ensure it's a string for comparison purposes.
         $value = array_map('strval', (array) $value);
+        if (is_array($disable)) {
+            $disable = array_map('strval', (array) $disable);
+        }
 
         // check if element may have multiple values
         $multiple = '';
@@ -117,7 +120,7 @@
         foreach ((array) $options as $opt_value => $opt_label) {
             if (is_array($opt_label)) {
                 $opt_disable = '';
-                if (is_array($disable) && in_array($opt_value, $disable)) {
+                if (is_array($disable) && in_array($opt_value, $disable, true)) {
                     $opt_disable = ' disabled="disabled"';
                 }
                 if (null !== $translator) {
@@ -158,6 +161,8 @@
         if (is_bool($disable)) {
             $disable = array();
         }
+        
+        $value = strval($value);
 
         $opt = '<option'
              . ' value="' . $this->view->escape($value) . '"'
@@ -168,8 +173,7 @@
             $opt .= ' selected="selected"';
         }
 
-        // disabled?
-        if (in_array($value, $disable)) {
+        if (in_array($value, $disable, true)) {
             $opt .= ' disabled="disabled"';
         }
 
Index: tests/Zend/View/Helper/FormSelectTest.php
===================================================================
--- tests/Zend/View/Helper/FormSelectTest.php	(revision 24537)
+++ tests/Zend/View/Helper/FormSelectTest.php	(working copy)
@@ -223,7 +223,7 @@
     }
 
     /**
-     * ZF-2513
+     * @group ZF-2513
      */
     public function testCanDisableOptGroupOptions()
     {
@@ -330,6 +330,63 @@
         $this->assertRegexp('/<optgroup[^>]*?id="baz-optgroup-bar"[^>]*?"bar"[^>]*?/', $html, $html);
     }
  
+    /**
+     * @group ZF-11812
+     */
+    public function testDisableActuallyDisablesTheRightOptionWhenPresentedWithZeroValue()
+    {
+        $this->view->doctype('XHTML1_STRICT');
+        $html = $this->helper->formSelect(array(
+            'name'         => 'baz',
+            'options' => array(
+                '0' => 'Zeroth Item',
+                '-' => 'Look, it\'s a dash!'
+            ),
+            'disable'      => array('-')
+        ));
+        $this->assertNotRegexp('/<select[^>]*?disabled/', $html, $html);
+        $this->assertNotRegexp('/<option value="0"[^>]*?disabled="disabled"/', $html, $html);
+        $this->assertRegexp('/<option value="-"[^>]*?disabled="disabled"/', $html, $html);
+    }  
+    
+    /**
+     * @group ZF-11812
+     */
+    public function testDisableActuallyDisablesTheRightOptionWhenPresentedWithZeroValueAndWorksWithIntValues()
+    {
+        $this->view->doctype('XHTML1_STRICT');
+        $html = $this->helper->formSelect(array(
+            'name'         => 'baz',
+            'options' => array(
+                0 => 'Zeroth Item',
+                1 => 'Look, it\'s a dash!'
+            ),
+            'disable'      => array(1)
+        ));
+        $this->assertNotRegexp('/<select[^>]*?disabled/', $html, $html);
+        $this->assertNotRegexp('/<option value="0"[^>]*?disabled="disabled"/', $html, $html);
+        $this->assertRegexp('/<option value="1"[^>]*?disabled="disabled"/', $html, $html);
+    } 
+    
+    /**
+     * @group ZF-11812
+     */
+    public function testDisableActuallyDisablesTheRightOptionAndNotTheOptgroupWhenPresentedWithZeroValue()
+    {
+        $this->view->doctype('XHTML1_STRICT');
+        $html = $this->helper->formSelect(array(
+            'name'         => 'baz',
+            'options' => array(
+                '0' => array(
+                    '-' => 'Look, it\'s a dash!'
+                )
+            ),
+            'disable'      => array('-')
+        ));
+        $this->assertNotRegexp('/<select[^>]*?disabled/', $html, $html);
+        $this->assertNotRegexp('/<optgroup[^>]*?disabled="disabled"[^>]*?"0"[^>]*?/', $html, $html);
+        $this->assertRegexp('/<option value="-"[^>]*?disabled="disabled"/', $html, $html);
+    }  
 }
 
 // Call Zend_View_Helper_FormSelectTest::main() if this source file is executed directly.