hgext/mq.py

--- a/hgext/mq.py	Thu Dec 23 15:12:24 2010 -0600
+++ b/hgext/mq.py	Sat Jan 01 18:42:04 2011 -0600
@@ -2533,7 +2533,7 @@
     backup = 'all'
     if opts.get('backup'):
         backup = 'strip'
-    elif opts.get('no-backup') or opts.get('nobackup'):
+    elif opts.get('no_backup') or opts.get('nobackup'):
         backup = 'none'
 
     cl = repo.changelog