Index: wp-admin/includes/file.php
===================================================================
--- wp-admin/includes/file.php	(revision 17614)
+++ wp-admin/includes/file.php	(working copy)
@@ -236,6 +236,7 @@
 	}
 
 	$file = apply_filters( 'wp_handle_upload_prefilter', $file );
+	$overrides = apply_filters( 'wp_handle_upload_overrides', $overrides );
 
 	// You may define your own function and pass the name in $overrides['upload_error_handler']
 	$upload_error_handler = 'wp_handle_upload_error';