Index: univention-management-console/src/univention/management/console/acl.py
===================================================================
--- univention-management-console/src/univention/management/console/acl.py	(Revision 14101)
+++ univention-management-console/src/univention/management/console/acl.py	(Arbeitskopie)
@@ -291,6 +291,8 @@
 		ACL.process( '' )
 
 	def _read_from_file( self, username ):
+		if isinstance(username, unicode):
+			username = username.encode('UTF-8')
 		filename = os.path.join( ACLs.CACHE_DIR,  username )
 
 		try:
@@ -320,6 +322,8 @@
 					self.acls.append( rule )
 
 	def _write_to_file( self, username ):
+		if isinstance(username, unicode):
+			username = username.encode('UTF-8')
 		filename = os.path.join( ACLs.CACHE_DIR,  username )
 
 		file = os.open( filename, os.O_WRONLY | os.O_TRUNC | os.O_CREAT, 0600 )