* Hopefully fixed the "no text part" bug -- # 417504

functions/mime.php

@@ -484,7 +484,7 @@
       global $show_html_default;
       
       if (! $message)
-	return;
+	return 0;
 
       // Show text/plain or text/html -- the first one we find.
       if ($message->header->type0 == 'text' &&