=== modified file 'sites/all/modules/contrib/mupload/mupload.module'
--- sites/all/modules/contrib/mupload/mupload.module    2011-05-12 23:08:10 +0000
+++ sites/all/modules/contrib/mupload/mupload.module    2011-05-17 04:10:58 +0000
@@ -424,6 +390,7 @@
   $file->filename = trim($file_info['name'], '.');
   $file->uri      = $file_info['tmppath'];
   $file->filemime = file_get_mimetype($file->filename);
+  $file->filesize = filesize($file->uri);
 
   $extensions = '';
   if (isset($validators['file_validate_extensions'])) {