From 78f33e3d3592b7a8a24347b93ba6db0e587080f1 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 26 Apr 2011 22:43:44 -0600
Subject: [PATCH] ...

---
 src/calibre/gui2/metadata/config.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/calibre/gui2/metadata/config.py b/src/calibre/gui2/metadata/config.py
index abb45faa46..cb51324ae0 100644
--- a/src/calibre/gui2/metadata/config.py
+++ b/src/calibre/gui2/metadata/config.py
@@ -41,8 +41,11 @@ class FieldsModel(FM): # {{{
         self.reset()
 
     def commit(self):
-        val = [k for k, v in self.overrides.iteritems() if v == Qt.Unchecked]
-        self.prefs['ignore_fields'] = val
+        ignored_fields = set([x for x in self.prefs['ignore_fields'] if x not in
+            self.overrides])
+        changed = set([k for k, v in self.overrides.iteritems() if v ==
+            Qt.Unchecked])
+        self.prefs['ignore_fields'] = list(ignored_fields.union(changed))
 
 # }}}