--- C:\Download\wordpress\wp-blog-header.php	Thu May 05 23:05:52 2005
+++ C:\Projects\SoftwareManiacs\www\wordpress\wp-blog-header.php	Fri May 13 18:04:56 2005
@@ -133,19 +133,21 @@
 	if (isset($_SERVER['HTTP_IF_NONE_MATCH'])) $client_etag = stripslashes($_SERVER['HTTP_IF_NONE_MATCH']);
 	else $client_etag = false;
 
-	if ( ($client_last_modified && $client_etag) ?
-		((strtotime($client_last_modified) >= strtotime($wp_last_modified)) && ($client_etag == $wp_etag)) :
-		((strtotime($client_last_modified) >= strtotime($wp_last_modified)) || ($client_etag == $wp_etag)) ) {
-		if ( preg_match('/cgi/',php_sapi_name()) ) {
-			header('Status: 304 Not Modified');
-			echo "\r\n\r\n";
-			exit;
-		} else {
-			if ( version_compare(phpversion(), '4.3.0', '>=') )
-				header('Not Modified', TRUE, 304);
-			else
-				header('HTTP/1.x 304 Not Modified');
-			exit;
+	if ($client_last_modified || $client_etag) {
+		if ( ($client_last_modified && $client_etag) ?
+			((strtotime($client_last_modified) >= strtotime($wp_last_modified)) && ($client_etag == $wp_etag)) :
+			((strtotime($client_last_modified) >= strtotime($wp_last_modified)) || ($client_etag == $wp_etag)) ) {
+			if ( preg_match('/cgi/',php_sapi_name()) ) {
+				header('Status: 304 Not Modified');
+				echo "\r\n\r\n";
+				exit;
+			} else {
+				if ( version_compare(phpversion(), '4.3.0', '>=') )
+					header('Not Modified', TRUE, 304);
+				else
+					header('HTTP/1.x 304 Not Modified');
+				exit;
+			}
 		}
 	}
 }