From a66c9c5e1a17925f11ecdccb53ceead0e012221b Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sat, 30 Jul 2011 15:48:08 -0600
Subject: [PATCH] ...

---
 src/calibre/ebooks/mobi/debug.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/calibre/ebooks/mobi/debug.py b/src/calibre/ebooks/mobi/debug.py
index bbd554919e..21401b2e6e 100644
--- a/src/calibre/ebooks/mobi/debug.py
+++ b/src/calibre/ebooks/mobi/debug.py
@@ -589,6 +589,7 @@ class Tag(object): # {{{
             try:
                 self.desc, self.attr = td[tag_type]
             except:
+                print ('Unknown tag value: %d'%tag_type)
                 self.desc = '??Unknown (tag value: %d)'%tag_type
                 self.attr = 'unknown'
         if '_offset' in self.attr: