diff --git a/changelog b/changelog
index 4ad77e9..559785c 100644
--- a/changelog
+++ b/changelog
@@ -2,6 +2,7 @@ Version 0.3.3 - 01/26/02007
  * fixed bug in reinitializing of plugins (Closes: #111)
  * fixed broken group membership changing of webserver (Closes: #114)
  * fixed glitch that delayed the effect of changes made by the plugin_manager
+ * ignore devices without read and write permissions
  * completed Slovenian translation
  * improved German translation
  * added: restore network settings during startup
diff --git a/plugins/encrypted_webinterface/unittests.py b/plugins/encrypted_webinterface/unittests.py
index d697c84..4bf09f9 100644
--- a/plugins/encrypted_webinterface/unittests.py
+++ b/plugins/encrypted_webinterface/unittests.py
@@ -29,5 +29,6 @@ class unittests(WebInterfaceTestClass):
 		url = self.url + "encrypted_webinterface"
 		self.register_auth(url)
 		self.cmd.go(url)
-		self.cmd.find("Data.Status.Plugins.encrypted_webinterface")
+		## TODO: enable it, as soon as the plugin is enabled by default
+		#self.cmd.find("Data.Status.Plugins.encrypted_webinterface")
 
diff --git a/plugins/language_selection/unittests.py b/plugins/language_selection/unittests.py
index c3dfcfe..ed96bfd 100644
--- a/plugins/language_selection/unittests.py
+++ b/plugins/language_selection/unittests.py
@@ -30,7 +30,7 @@ class unittests(WebInterfaceTestClass):
 		url = self.url + "language_selection?weblang=en"
 		self.register_auth(url)
 		self.cmd.go(url)
-		self.cmd.find('Choose an interface language')
+		self.cmd.find('Choose your tongue')
 
 
 	def test_check_language_list(self):
diff --git a/plugins/network/unittests.py b/plugins/network/unittests.py
index b72b47f..1b9ca46 100644
--- a/plugins/network/unittests.py
+++ b/plugins/network/unittests.py
@@ -46,10 +46,10 @@ class unittests(WebInterfaceTestClass):
 		self.assertEquals(4, len(orig_ip_octs))
 		def set_ip((ip1, ip2, ip3, ip4)):
 			self.cmd.go(self.url + "network")
-			self.cmd.formvalue("set_ip", "ip1", str(ip1))
-			self.cmd.formvalue("set_ip", "ip2", str(ip2))
-			self.cmd.formvalue("set_ip", "ip3", str(ip3))
-			self.cmd.formvalue("set_ip", "ip4", str(ip4))
+			self.cmd.formvalue("network_address", "ip1", str(ip1))
+			self.cmd.formvalue("network_address", "ip2", str(ip2))
+			self.cmd.formvalue("network_address", "ip3", str(ip3))
+			self.cmd.formvalue("network_address", "ip4", str(ip4))
 			self.cmd.submit()
 			## sleep a little bit longer than the delay necessary for ip-change
 			time.sleep(CHANGE_IP_DELAY + 3)
@@ -73,6 +73,6 @@ class unittests(WebInterfaceTestClass):
 		self.register_auth(self.url + "network")
 		self.cmd.go(self.url + "network" + "?redirected=1")
 		self.cmd.notfind("problem")
-		self.cmd.go(self.url + "network" + "?store=1")
+		self.cmd.go(self.url + "network" + "?store=set_ip")
 		self.cmd.find("invalid network address")
 
diff --git a/plugins/user_manager/unittests.py b/plugins/user_manager/unittests.py
index f4f2670..6ddf693 100644
--- a/plugins/user_manager/unittests.py
+++ b/plugins/user_manager/unittests.py
@@ -31,7 +31,7 @@ class unittests(WebInterfaceTestClass):
 	def test_read_users(self):
 		"""does the 'admin' user exist?"""
 		cur_users = self._getUsers()
-		self.cmd.find("Manage users")
+		self.cmd.find("Add new user")
 		self.assertTrue("admin" in cur_users)
 
 
diff --git a/plugins/volume_mount/unittests.py b/plugins/volume_mount/unittests.py
index a0fb7ad..b345094 100644
--- a/plugins/volume_mount/unittests.py
+++ b/plugins/volume_mount/unittests.py
@@ -35,7 +35,7 @@ class unittests(WebInterfaceTestClass):
 		url = self.url + "volume_mount?weblang=en&device=" + self.device_html
 		self.register_auth(url)
 		self.cmd.go(url)
-		self.cmd.find('Open volume')
+		self.cmd.find('Open this volume')
 		self.cmd.find('Data.Status.Plugins.volume_mount=passive')
 	
 
diff --git a/plugins/volume_rename/unittests.py b/plugins/volume_rename/unittests.py
index 6714066..7038b57 100644
--- a/plugins/volume_rename/unittests.py
+++ b/plugins/volume_rename/unittests.py
@@ -34,7 +34,7 @@ class unittests(WebInterfaceTestClass):
 		cbox_tools.umount(self.device)
 		## check a language string
 		self.cmd.go(url)
-		self.cmd.find('Change the name of this volume')
+		self.cmd.find('Change name')
 
 
 	def test_rename(self):
diff --git a/src/cryptobox/core/settings.py b/src/cryptobox/core/settings.py
index 74eb212..d1dc007 100644
--- a/src/cryptobox/core/settings.py
+++ b/src/cryptobox/core/settings.py
@@ -51,6 +51,8 @@ class CryptoBoxSettings:
 		config_file = self.__get_config_filename(config_file)
 		self.log.info("loading config file: %s" % config_file)
 		self.prefs = self.__get_preferences(config_file)
+		if not "PluginSettings" in self.prefs:
+			self.prefs["PluginSettings"] = {}
 		self.__validate_config()
 		self.__configure_log_handler()
 		self.__check_unknown_preferences()
diff --git a/src/cryptobox/plugins/base.py b/src/cryptobox/plugins/base.py
index 01b4075..73a6c79 100644
--- a/src/cryptobox/plugins/base.py
+++ b/src/cryptobox/plugins/base.py
@@ -56,7 +56,23 @@ class CryptoBoxPlugin:
 
 
 	def __init__(self, cbox, plugin_dir, site_class=None):
-		self.cbox = cbox
+		if cbox:
+			self.cbox = cbox
+		else:
+			## define empty dummy class as a replacement for a cbox instance
+			class CBoxPrefs(dict):
+				plugin_conf = {}
+			class CBoxLogger:
+				def debug(self, text):
+					pass
+				info = debug
+				warn = debug
+				error = debug
+			class CBoxMinimal:
+				prefs = CBoxPrefs()
+				prefs["PluginSettings"] = {}
+				log = CBoxLogger()
+			self.cbox = CBoxMinimal()
 		self.hdf = {}
 		self.plugin_dir = plugin_dir
 		self.hdf_prefix = "Data.Plugins.%s." % self.get_name()
diff --git a/src/cryptobox/tests/test.cryptobox.py b/src/cryptobox/tests/test.cryptobox.py
index 5b4c274..a05b7c5 100755
--- a/src/cryptobox/tests/test.cryptobox.py
+++ b/src/cryptobox/tests/test.cryptobox.py
@@ -41,9 +41,7 @@ class CryptoBoxDeviceTests(CommonTestClass):
 
 	def test_allowed_devices(self):
 		'''is_device_allowed should accept permitted devices'''
-		self.assertTrue(self.cb.is_device_allowed("/dev/loop"))
 		self.assertTrue(self.cb.is_device_allowed("/dev/loop1"))
-		self.assertTrue(self.cb.is_device_allowed("/dev/loop/urgd"))
 		self.assertTrue(self.cb.is_device_allowed("/dev/usb/../loop1"))
 
 
@@ -52,6 +50,8 @@ class CryptoBoxDeviceTests(CommonTestClass):
 		self.assertFalse(self.cb.is_device_allowed("/dev/hda"))
 		self.assertFalse(self.cb.is_device_allowed("/dev/loopa/../hda"))
 		self.assertFalse(self.cb.is_device_allowed("/"))
+		## this device does not exist -> no permission check possible
+		self.assertFalse(self.cb.is_device_allowed("/dev/loop"))
 
 
 
diff --git a/templates/language.hdf b/templates/language.hdf
index 1a4df20..e5b0ff9 100644
--- a/templates/language.hdf
+++ b/templates/language.hdf
@@ -27,8 +27,8 @@ Button {
 AdviceMessage {
 
 	VolumeIsBusy {
-		Title	= Disk is busy
-		Text	= This disk is currently busy. Please wait for a moment.
+		Title	= Busy volume
+		Text	= This volume is currently busy. Please wait for a moment.
 		Link.Rel	= /
 		Link.Text	= Show all disks
 	}