diff --git a/about.py b/about.py
index 39496d3..bd9da6b 100644
--- a/about.py
+++ b/about.py
@@ -20,10 +20,10 @@
 
 from PyQt4 import QtCore, QtGui
 try: #If QtWebKit is available, uses it
-	from PyQt4 import QtWebKit
-	webk=True
+    from PyQt4 import QtWebKit
+    webk=True
 except:
-	webk=False
+    webk=False
 import relational
 
 class Ui_Dialog(object):
@@ -84,16 +84,18 @@ class Ui_Dialog(object):
         self.verticalLayout_7 = QtGui.QVBoxLayout(self.tab_2)
         self.verticalLayout_7.setObjectName("verticalLayout_7")
         if (webk):
-		self.webView = QtWebKit.QWebView(self.tab_2)
-        	self.webView.setUrl(QtCore.QUrl("http://galileo.dmi.unict.it/wiki/relational/doku.php"))
-        	self.webView.setObjectName("webView")
-		self.verticalLayout_7.addWidget(self.webView)
-	else:
-		self.webError = QtGui.QLabel(self.groupBox)
-		self.webError.setFont(font)
-        	self.webError.setObjectName("lblError")
-        	self.verticalLayout_7.addWidget(self.webError)
-		self.webError.setText(QtGui.QApplication.translate("Dialog", "Error! Unable to import QtWebKit module.", None, QtGui.QApplication.UnicodeUTF8))
+            self.webView = QtWebKit.QWebView(self.tab_2)
+            self.webView.setUrl(QtCore.QUrl("http://galileo.dmi.unict.it/wiki/relational/doku.php"))
+            self.webView.setObjectName("webView")
+            self.verticalLayout_7.addWidget(self.webView)
+        else:
+            self.webError = QtGui.QLabel(self.groupBox)
+            self.webError.setFont(font)
+            self.webError.setObjectName("lblError")
+            self.verticalLayout_7.addWidget(self.webError)
+            self.webError.setText(QtGui.QApplication.translate("Dialog", "Error! Unable to import QtWebKit module.", None, 
+        
+        QtGui.QApplication.UnicodeUTF8))
         self.tabWidget.addTab(self.tab_2,"")
         self.verticalLayout_2.addWidget(self.tabWidget)
         self.buttonBox = QtGui.QDialogButtonBox(Dialog)
@@ -106,7 +108,7 @@ class Ui_Dialog(object):
         self.tabWidget.setCurrentIndex(0)
         QtCore.QObject.connect(self.buttonBox,QtCore.SIGNAL("accepted()"),Dialog.accept)
         QtCore.QObject.connect(self.buttonBox,QtCore.SIGNAL("rejected()"),Dialog.reject)
-	#QtCore.QObject.connect(self.label_4,QtCore.SIGNAL("linkActivated()"),self.openSite)
+    #QtCore.QObject.connect(self.label_4,QtCore.SIGNAL("linkActivated()"),self.openSite)
         QtCore.QMetaObject.connectSlotsByName(Dialog)
     def openSite(self):
       print "ciao"
@@ -115,14 +117,13 @@ class Ui_Dialog(object):
         self.groupBox.setTitle(QtGui.QApplication.translate("Dialog", "Relational", None, QtGui.QApplication.UnicodeUTF8))
         self.label.setText(QtGui.QApplication.translate("Dialog", "Relational", None, QtGui.QApplication.UnicodeUTF8))
         self.label_3.setText(QtGui.QApplication.translate("Dialog", "Version "+relational.version, None, QtGui.QApplication.UnicodeUTF8))
-	self.label_3.setTextInteractionFlags(QtCore.Qt.LinksAccessibleByMouse|QtCore.Qt.TextSelectableByMouse)
+        self.label_3.setTextInteractionFlags(QtCore.Qt.LinksAccessibleByMouse|QtCore.Qt.TextSelectableByMouse)
         self.groupBox_3.setTitle(QtGui.QApplication.translate("Dialog", "Author", None, QtGui.QApplication.UnicodeUTF8))
         self.label_2.setText(QtGui.QApplication.translate("Dialog", "Salvo \"LtWorf\" Tomaselli <tiposchi@tiscali.it>", None, QtGui.QApplication.UnicodeUTF8))
-	self.label_2.setTextInteractionFlags(QtCore.Qt.LinksAccessibleByMouse|QtCore.Qt.TextSelectableByMouse)
+        self.label_2.setTextInteractionFlags(QtCore.Qt.LinksAccessibleByMouse|QtCore.Qt.TextSelectableByMouse)
         self.groupBox_2.setTitle(QtGui.QApplication.translate("Dialog", "Links", None, QtGui.QApplication.UnicodeUTF8))
         self.label_4.setText(QtGui.QApplication.translate("Dialog", "http://galileo.dmi.unict.it/wiki/relational/", None, QtGui.QApplication.UnicodeUTF8))
-	self.label_4.setTextInteractionFlags(QtCore.Qt.LinksAccessibleByMouse|QtCore.Qt.TextSelectableByMouse)
-	
+        self.label_4.setTextInteractionFlags(QtCore.Qt.LinksAccessibleByMouse|QtCore.Qt.TextSelectableByMouse)
         self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab), QtGui.QApplication.translate("Dialog", "About", None, QtGui.QApplication.UnicodeUTF8))
         self.textEdit.setHtml(QtGui.QApplication.translate("Dialog", "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"
 "<html><head><meta name=\"qrichtext\" content=\"1\" /><title>GNU General Public License - GNU Project - Free Software Foundation (FSF)</title><style type=\"text/css\">\n"
diff --git a/maingui.py b/maingui.py
index 979445a..31f7932 100644
--- a/maingui.py
+++ b/maingui.py
@@ -98,7 +98,7 @@ class Ui_Form(object):
         filename+=".csv"
       
       for i in self.lstRelations.selectedItems():
-            self.relations[str(i.text().toUtf8())].save(filename,use_csv)
+            self.relations[str(i.text().toUtf8())].save(filename)
       return
     def unloadRelation(self):
         for i in self.lstRelations.selectedItems():
diff --git a/samples/dates.tlb b/samples/dates.tlb
deleted file mode 100644
index 663e142..0000000
--- a/samples/dates.tlb
+++ /dev/null
@@ -1,6 +0,0 @@
-date
-2008-12-12
-2007-08-12
-1985-05-09
-1988-4-21
-1992-7-27
\ No newline at end of file
diff --git a/samples/people.tlb b/samples/people.tlb
deleted file mode 100644
index aea76e8..0000000
--- a/samples/people.tlb
+++ /dev/null
@@ -1,9 +0,0 @@
-id name chief age
-0 jack 0 22
-1 carl 0 20
-2 john 1 30
-3 dean 1 33
-4 eve 0 25
-5 duncan 4 30
-6 paul 4 30
-7 alia 1 28
diff --git a/samples/person_room.tlb b/samples/person_room.tlb
deleted file mode 100644
index 32f9784..0000000
--- a/samples/person_room.tlb
+++ /dev/null
@@ -1,9 +0,0 @@
-id room
-0 1
-1 4
-2 2
-3 2
-4 5
-5 1
-6 5
-7 1
\ No newline at end of file
diff --git a/samples/rooms.tlb b/samples/rooms.tlb
deleted file mode 100644
index 01cacff..0000000
--- a/samples/rooms.tlb
+++ /dev/null
@@ -1,9 +0,0 @@
-room phone
-0 1515
-1 1516
-2 1617
-3 1601
-4 1041
-5 9212
-6 1424
-7 1294
\ No newline at end of file
diff --git a/samples/skills.tlb b/samples/skills.tlb
deleted file mode 100644
index e553f2f..0000000
--- a/samples/skills.tlb
+++ /dev/null
@@ -1,18 +0,0 @@
-id skill
-0 C
-0 Python
-1 Python
-1 C++
-1 SystemAdmin
-2 C
-2 PHP
-3 C++
-4 C++
-4 C
-4 Perl
-5 Perl
-5 C
-7 Python
-7 C
-7 PHP
-9 Java