Index: wp-includes/ms-blogs.php
===================================================================
--- wp-includes/ms-blogs.php	(revision 21827)
+++ wp-includes/ms-blogs.php	(working copy)
@@ -251,9 +251,10 @@
 
 	wp_cache_delete( $blog_id , 'blog-details' );
 	wp_cache_delete( $blog_id . 'short' , 'blog-details' );
-	wp_cache_delete( md5( $details->domain . $details->path )  , 'blog-lookup' );
+	wp_cache_delete( md5( $wpdb->escape( $details->domain ) . $wpdb->escape( $details->path ) )  , 'blog-lookup' );
 	wp_cache_delete( 'current_blog_' . $details->domain, 'site-options' );
 	wp_cache_delete( 'current_blog_' . $details->domain . $details->path, 'site-options' );
+	wp_cache_delete( 'get_id_from_blogname_' . $details->blogname, 'blog-details' );
 
 	do_action( 'refresh_blog_details', $blog_id );
 }