Index: wp-includes/vars.php
===================================================================
--- wp-includes/vars.php	(revision 15646)
+++ wp-includes/vars.php	(working copy)
@@ -40,7 +40,7 @@
 if ( isset($_SERVER['HTTP_USER_AGENT']) ) {
 	if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Lynx') !== false ) {
 		$is_lynx = true;
-	} elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'chrome') !== false ) {
+	} elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'chrome') !== false && strpos( $_SERVER['HTTP_USER_AGENT'], 'chromeframe' ) === false ) {
 		$is_chrome = true;
 	} elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'safari') !== false ) {
 		$is_safari = true;