diff --git a/tuned/gtk/gui_plugin_loader.py b/tuned/gtk/gui_plugin_loader.py
index 2b3e93b..67fa195 100644
--- a/tuned/gtk/gui_plugin_loader.py
+++ b/tuned/gtk/gui_plugin_loader.py
@@ -33,7 +33,7 @@ import tuned.consts as consts
 import tuned.logs
 import tuned.plugins.repository as repository
 import configobj as ConfigObj
-import tuned.exceptions as TunedException
+from tuned.exceptions import TunedException
 
 from tuned import plugins
 from tuned.utils.plugin_loader import PluginLoader
@@ -42,7 +42,7 @@ from tuned import storage, units, monitors, plugins, profiles, exports, \
 
 import tuned.plugins as Plugins
 
-__all__ = ['GTKPluginLoader']
+__all__ = ['GuiPluginLoader']
 
 global_config_spec = ['dynamic_tuning = boolean(default=%s)'
                       % consts.CFG_DEF_DYNAMIC_TUNING,
diff --git a/tuned/gtk/gui_profile_loader.py b/tuned/gtk/gui_profile_loader.py
index 47b2da6..10bd7cd 100644
--- a/tuned/gtk/gui_profile_loader.py
+++ b/tuned/gtk/gui_profile_loader.py
@@ -123,10 +123,6 @@ class GuiProfileLoader(object):
         config.write()
         self._refresh_profiles()
 
-    def _refresh_profiles(self):
-        self.profiles = {}
-        self._load_all_profiles()
-
     def update_profile(
         self,
         old_profile_name,
diff --git a/tuned/gtk/managerException.py b/tuned/gtk/managerException.py
index 9589b52..958a346 100644
--- a/tuned/gtk/managerException.py
+++ b/tuned/gtk/managerException.py
@@ -38,10 +38,8 @@ class ManagerException(Exception):
 
         return repr(self.code)
 
-    def profile_already_exists(self, text):
-        return repr(text)
-
-    def profile_already_exists(self):
-        return repr(self.code)
-
-
+    def profile_already_exists(self, text=None):
+        if text is None:
+            return repr(self.code)
+        else:
+            return repr(text)
diff --git a/tuned/plugins/plugin_bootloader.py b/tuned/plugins/plugin_bootloader.py
index 8e2ae91..fc76063 100644
--- a/tuned/plugins/plugin_bootloader.py
+++ b/tuned/plugins/plugin_bootloader.py
@@ -27,7 +27,7 @@ class BootloaderPlugin(base.Plugin):
 	def _instance_init(self, instance):
 		instance._has_dynamic_tuning = False
 		instance._has_static_tuning = True
-		self._grub2_cfg_file = self._get_grub2_cfg_file()
+		self._grub2_cfg_file_name = self._get_grub2_cfg_file()
 
 	def _instance_cleanup(self, instance):
 		pass
@@ -82,7 +82,7 @@ class BootloaderPlugin(base.Plugin):
 
 	def _remove_grub2_tuning(self):
 		self._patch_bootcmdline("")
-		self._cmd.replace_in_file(self._grub2_cfg_file, r"\b(set\s+" + consts.GRUB2_TUNED_VAR + r"\s*=).*$", r"\1" + "\"\"")
+		self._cmd.replace_in_file(self._grub2_cfg_file_name, r"\b(set\s+" + consts.GRUB2_TUNED_VAR + r"\s*=).*$", r"\1" + "\"\"")
 
 	def _instance_unapply_static(self, instance, profile_switch = False):
 		if profile_switch:
@@ -121,18 +121,18 @@ class BootloaderPlugin(base.Plugin):
 
 	def _grub2_cfg_patch(self, value):
 		log.debug("patching grub.cfg")
-		if self._grub2_cfg_file is None:
+		if self._grub2_cfg_file_name is None:
 			log.error("cannot find grub.cfg to patch, you need to regenerate it by hand by grub2-mkconfig")
 			return False
-		grub2_cfg = self._cmd.read_file(self._grub2_cfg_file)
+		grub2_cfg = self._cmd.read_file(self._grub2_cfg_file_name)
 		if len(grub2_cfg) <= 0:
-			log.error("error patching %s, you need to regenerate it by hand by grub2-mkconfig" % self._grub2_cfg_file)
+			log.error("error patching %s, you need to regenerate it by hand by grub2-mkconfig" % self._grub2_cfg_file_name)
 			return False
-		log.debug("adding boot command line parameters to '%s'" % self._grub2_cfg_file)
+		log.debug("adding boot command line parameters to '%s'" % self._grub2_cfg_file_name)
 		(grub2_cfg_new, nsubs) = re.subn(r"\b(set\s+" + consts.GRUB2_TUNED_VAR + "\s*=).*$", r"\1" + "\"" + str(value) + "\"", grub2_cfg, flags = re.MULTILINE)
 		if nsubs < 1 or re.search(r"\$" + consts.GRUB2_TUNED_VAR, grub2_cfg, flags = re.MULTILINE) is None:
 			grub2_cfg_new = self._grub2_cfg_patch_initial(self._grub2_cfg_unpatch(grub2_cfg), value)
-		self._cmd.write_to_file(self._grub2_cfg_file, grub2_cfg_new)
+		self._cmd.write_to_file(self._grub2_cfg_file_name, grub2_cfg_new)
 		self._grub2_default_env_patch()
 		return True
 
@@ -142,7 +142,7 @@ class BootloaderPlugin(base.Plugin):
 		if verify:
 			return None
 		if enabling and value is not None:
-			self._grub2_cfg_file = value
+			self._grub2_cfg_file_name = value
 
 	@command_custom("cmdline", per_device = False, priority = 10)
 	def _cmdline(self, enabling, value, verify, ignore_missing):
diff --git a/tuned/profiles/variables.py b/tuned/profiles/variables.py
index 396e590..a871ad9 100644
--- a/tuned/profiles/variables.py
+++ b/tuned/profiles/variables.py
@@ -4,7 +4,7 @@ import tuned.logs
 import functions.functions as functions
 import tuned.consts as consts
 from tuned.utils.commands import commands
-from configobj import ConfigObj
+from configobj import ConfigObj, ConfigObjError
 
 log = tuned.logs.get()
 
diff --git a/tuned/utils/commands.py b/tuned/utils/commands.py
index d5b2a1f..672ea0e 100644
--- a/tuned/utils/commands.py
+++ b/tuned/utils/commands.py
@@ -129,7 +129,7 @@ class commands:
 			os.rename(src, dst)
 		except OSError as error:
 			if not no_error:
-				log.error("cannot rename file '%s' to '%s': '%s'" % (f, str(error)))
+				log.error("cannot rename file '%s' to '%s': '%s'" % (src, dst, str(error)))
 			return False
 		return True
 
diff --git a/tuned/utils/plugin_loader.py b/tuned/utils/plugin_loader.py
index aa80e20..cdaa040 100644
--- a/tuned/utils/plugin_loader.py
+++ b/tuned/utils/plugin_loader.py
@@ -17,6 +17,9 @@ class PluginLoader(object):
 	def __init__(self):
 		super(PluginLoader, self).__init__()
 
+		self._namespace = None
+		self._prefix = None
+		self._interface = None
 		self._set_loader_parameters()
 		assert type(self._namespace) is str
 		assert type(self._prefix) is str