=== modified file 'includes/theme.inc'
--- includes/theme.inc	2008-10-16 13:50:21 +0000
+++ includes/theme.inc	2008-10-19 01:09:19 +0000
@@ -1799,7 +1799,7 @@ function template_preprocess_page(&$vari
   // Load all region content assigned via blocks.
   foreach (array_keys($regions) as $region) {
     // Prevent left and right regions from rendering blocks when 'show_blocks' == FALSE.
-    if (!(!$variables['show_blocks'] && ($region == 'left' || $region == 'right'))) {
+    if ($variables['show_blocks'] || ($region != 'left' && $region != 'right'))) {
       $blocks = theme('blocks', $region);
     }
     else {