--- a/cwctl.py	Fri Jul 24 15:28:03 2009 +0200
+++ b/cwctl.py	Fri Jul 24 15:43:11 2009 +0200
@@ -313,6 +313,7 @@
         # create the additional data directory for this instance
         if config.appdatahome != config.apphome: # true in dev mode
             create_dir(config.appdatahome)
+        create_dir(join(config.appdatahome, 'backup'))
         if config['uid']:
             from logilab.common.shellutils import chown
             # this directory should be owned by the uid of the server process