--- zopectl.py.orig	2012-09-28 13:09:10.704292212 +0200
+++ zopectl.py	2012-09-28 13:09:55.111027015 +0200
@@ -180,7 +180,8 @@
         self.directory = config.instancehome
         self.clienthome = config.clienthome
         if self.program:
-            self.program = [self.program]
+            if isinstance(self.program, basestring):
+                self.program = [self.program]
         elif config.runner and config.runner.program:
             self.program = config.runner.program
         else: