diff --git a/branches/ucs-3.2/ucs-3.2-0/base/univention-config-registry/python/univention/config_registry/handler.py b/branches/ucs-3.2/ucs-3.2-0/base/univention-config-registry/python/univention/config_registry/handler.py
index 3e2064a..d44cf0f 100644
--- a/branches/ucs-3.2/ucs-3.2-0/base/univention-config-registry/python/univention/config_registry/handler.py
+++ b/branches/ucs-3.2/ucs-3.2-0/base/univention-config-registry/python/univention/config_registry/handler.py
@@ -135,15 +135,13 @@ def run_script(script, arg, changes):
 	For each changed variable a line with the 'name of the variable', the 'old
 	value', and the 'new value' are passed seperated by '@%@'.
 	"""
-	diff = []
-	for key, value in changes.items():
-		if value and len(value) > 1 and value[0] and value[1]:
-			diff.append('%s@%%@%s@%%@%s\n' % (key, value[0], value[1]))
+	diff = ['@%@'.join((key, old or '', new or ''))
+			for key, (old, new) in changes.items()]
 
 	cmd = script + " " + arg
 	proc = subprocess.Popen(cmd, shell=True, stdin=subprocess.PIPE,
 			close_fds=True)
-	proc.communicate(''.join(diff))
+	proc.communicate('\n'.join(diff))
 
 
 def run_module(modpath, arg, ucr, changes):