Index: includes/OutputPage.php
===================================================================
--- includes/OutputPage.php	(revision 81886)
+++ includes/OutputPage.php	(working copy)
@@ -2495,6 +2495,12 @@
 				foreach ( $modules as $module ) {
 					$timestamp = max( $timestamp, $module->getModifiedTime( $context ) );
 				}
+				// When the modules are empty, i.e. the wiki pages don't exist, skip doing the
+				// request in the first place
+				// FIXME: Need a cleaner interface for that
+				if( $timestamp === 1 ) {
+					continue;
+				}
 				// Add a version parameter so cache will break when things change
 				$query['version'] = wfTimestamp( TS_ISO_8601_BASIC, round( $timestamp, -2 ) );
 			}