diff --git a/ThreadsafeTimer.py b/ThreadsafeTimer.py
index d8c4bcee..f2de9791 100644
--- a/ThreadsafeTimer.py
+++ b/ThreadsafeTimer.py
@@ -1,41 +1,41 @@
-from pyqtgraph.Qt import QtCore, QtGui
-
-class ThreadsafeTimer(QtCore.QObject):
-    """
-    Thread-safe replacement for QTimer.
-    """
-    
-    timeout = QtCore.Signal()
-    sigTimerStopRequested = QtCore.Signal()
-    sigTimerStartRequested = QtCore.Signal(object)
-    
-    def __init__(self):
-        QtCore.QObject.__init__(self)
-        self.timer = QtCore.QTimer()
-        self.timer.timeout.connect(self.timerFinished)
-        self.timer.moveToThread(QtCore.QCoreApplication.instance().thread())
-        self.moveToThread(QtCore.QCoreApplication.instance().thread())
-        self.sigTimerStopRequested.connect(self.stop, QtCore.Qt.QueuedConnection)
-        self.sigTimerStartRequested.connect(self.start, QtCore.Qt.QueuedConnection)
-        
-        
-    def start(self, timeout):
-        isGuiThread = QtCore.QThread.currentThread() == QtCore.QCoreApplication.instance().thread()
-        if isGuiThread:
-            #print "start timer", self, "from gui thread"
-            self.timer.start(timeout)
-        else:
-            #print "start timer", self, "from remote thread"
-            self.sigTimerStartRequested.emit(timeout)
-        
-    def stop(self):
-        isGuiThread = QtCore.QThread.currentThread() == QtCore.QCoreApplication.instance().thread()
-        if isGuiThread:
-            #print "stop timer", self, "from gui thread"
-            self.timer.stop()
-        else:
-            #print "stop timer", self, "from remote thread"
-            self.sigTimerStopRequested.emit()
-        
-    def timerFinished(self):
+from pyqtgraph.Qt import QtCore, QtGui
+
+class ThreadsafeTimer(QtCore.QObject):
+    """
+    Thread-safe replacement for QTimer.
+    """
+    
+    timeout = QtCore.Signal()
+    sigTimerStopRequested = QtCore.Signal()
+    sigTimerStartRequested = QtCore.Signal(object)
+    
+    def __init__(self):
+        QtCore.QObject.__init__(self)
+        self.timer = QtCore.QTimer()
+        self.timer.timeout.connect(self.timerFinished)
+        self.timer.moveToThread(QtCore.QCoreApplication.instance().thread())
+        self.moveToThread(QtCore.QCoreApplication.instance().thread())
+        self.sigTimerStopRequested.connect(self.stop, QtCore.Qt.QueuedConnection)
+        self.sigTimerStartRequested.connect(self.start, QtCore.Qt.QueuedConnection)
+        
+        
+    def start(self, timeout):
+        isGuiThread = QtCore.QThread.currentThread() == QtCore.QCoreApplication.instance().thread()
+        if isGuiThread:
+            #print "start timer", self, "from gui thread"
+            self.timer.start(timeout)
+        else:
+            #print "start timer", self, "from remote thread"
+            self.sigTimerStartRequested.emit(timeout)
+        
+    def stop(self):
+        isGuiThread = QtCore.QThread.currentThread() == QtCore.QCoreApplication.instance().thread()
+        if isGuiThread:
+            #print "stop timer", self, "from gui thread"
+            self.timer.stop()
+        else:
+            #print "stop timer", self, "from remote thread"
+            self.sigTimerStopRequested.emit()
+        
+    def timerFinished(self):
         self.timeout.emit()
\ No newline at end of file
diff --git a/examples/Arrow.py b/examples/Arrow.py
old mode 100755
new mode 100644
diff --git a/examples/GraphicsLayout.py b/examples/GraphicsLayout.py
old mode 100755
new mode 100644
diff --git a/examples/ScatterPlot.py b/examples/ScatterPlot.py
old mode 100755
new mode 100644
diff --git a/examples/ViewBox.py b/examples/ViewBox.py
old mode 100755
new mode 100644
diff --git a/graphicsItems/PlotDataItem.py b/graphicsItems/PlotDataItem.py
index 44869f17..572c2c65 100644
--- a/graphicsItems/PlotDataItem.py
+++ b/graphicsItems/PlotDataItem.py
@@ -247,7 +247,6 @@ class PlotDataItem(GraphicsObject):
         if len(args) == 1:
             data = args[0]
             dt = dataType(data)
-            print "plot:", dt, type(data)
             if dt == 'empty':
                 pass
             elif dt == 'listOfValues':
diff --git a/graphicsItems/ROI.py b/graphicsItems/ROI.py
old mode 100755
new mode 100644