diff --git a/branches/ucs-3.2/ucs-3.2-0/base/univention-system-setup/umc/python/setup/util.py b/branches/ucs-3.2/ucs-3.2-0/base/univention-system-setup/umc/python/setup/util.py
index 81e54a5..f09e1cc 100644
--- a/branches/ucs-3.2/ucs-3.2-0/base/univention-system-setup/umc/python/setup/util.py
+++ b/branches/ucs-3.2/ucs-3.2-0/base/univention-system-setup/umc/python/setup/util.py
@@ -353,12 +353,12 @@ def run_scripts( progressParser, restartServer = False ):
 	f.flush()
 
 	# make sure that UMC servers and apache will not be restartet
-	subprocess.call( CMD_DISABLE_EXEC, stdout = f, stderr = f )
+	subprocess.call(CMD_DISABLE_EXEC, stdout=f, stderr=f, close_fds=True)
 
 	for scriptpath in sorted_files_in_subdirs( PATH_SETUP_SCRIPTS ):
 			# launch script
 			MODULE.info('Running script %s\n' % scriptpath)
-			p = subprocess.Popen( scriptpath, stdout = subprocess.PIPE, stderr = subprocess.STDOUT )
+			p = subprocess.Popen(scriptpath, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, close_fds=True)
 			while True:
 				line = p.stdout.readline()
 				if not line:
@@ -368,13 +368,13 @@ def run_scripts( progressParser, restartServer = False ):
 			p.wait()
 
 	# enable execution of servers again
-	subprocess.call(CMD_ENABLE_EXEC, stdout=f, stderr=f)
+	subprocess.call(CMD_ENABLE_EXEC, stdout=f, stderr=f, close_fds=True)
 
 	if restartServer:
 		f.write('=== Restart of UMC server and web server (%s) ===\n' % timestamp())
 		f.flush()
-		subprocess.call(['/etc/init.d/univention-management-console-server', 'restart'], stdout=f, stderr=f)
-		subprocess.call(['/etc/init.d/univention-management-console-web-server', 'restart'], stdout=f, stderr=f)
+		subprocess.call(['/etc/init.d/univention-management-console-server', 'restart'], stdout=f, stderr=f, close_fds=True)
+		subprocess.call(['/etc/init.d/univention-management-console-web-server', 'restart'], stdout=f, stderr=f, close_fds=True)
 
 	f.write('\n=== DONE (%s) ===\n\n' % timestamp())
 	f.close()
@@ -388,7 +388,7 @@ def run_joinscript( progressParser, _username, password ):
 	progressParser.fractions[ 'setup-join.sh' ] = 50
 	progressParser.current.max = sum( progressParser.fractions.values() )
 	def runit( command ):
-		p = subprocess.Popen( command, stdout = subprocess.PIPE, stderr = subprocess.STDOUT )
+		p = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, close_fds=True)
 		while True:
 			line = p.stdout.readline()
 			if not line:
@@ -460,11 +460,11 @@ def cleanup():
 				keys.append(var.replace('/type', '/%s' % k))
 			univention.config_registry.handler_unset(keys)
 			# Shut down temporary interface
-			subprocess.call(['ifconfig', var.split('/')[1].replace('_', ':'), 'down'])
+			subprocess.call(['ifconfig', var.split('/')[1].replace('_', ':'), 'down'], close_fds=True)
 
 	# force a restart of UMC servers and apache
-	subprocess.call( CMD_DISABLE_EXEC, stdout = f, stderr = f )
-	subprocess.call( CMD_ENABLE_EXEC_WITH_RESTART, stdout = f, stderr = f )
+	subprocess.call(CMD_DISABLE_EXEC, stdout=f, stderr=f, close_fds=True)
+	subprocess.call(CMD_ENABLE_EXEC_WITH_RESTART, stdout=f, stderr=f, close_fds=True)
 
 	f.write('\n=== DONE (%s) ===\n\n' % timestamp())
 	f.flush()
@@ -529,7 +529,7 @@ def dhclient(interface, timeout=None):
 			'-sf', '/lib/univention-installer/dhclient-script-wrapper',
 			'-e', 'dhclientscript_outputfile=%s' % (tempfilename,),
 			interface)
-	p = subprocess.Popen(cmd, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
+	p = subprocess.Popen(cmd, stderr=subprocess.PIPE, stdout=subprocess.PIPE, close_fds=True)
 
 	# read from stderr until timeout, following recipe of subprocess.communicate()
 	def _readerthread(fh, stringbufferlist):
@@ -760,4 +760,3 @@ def get_available_locales(pattern, category='language_en'):
 			})
 
 	return locales
-