diff --git a/src/file_transfers.py b/src/file_transfers.py
index 33c6089..8e41c21 100644
--- a/src/file_transfers.py
+++ b/src/file_transfers.py
@@ -160,11 +160,14 @@ class ReceiveTransfer(FileTransfer):
 
 
 class ReceiveAvatar(ReceiveTransfer):
+    MAX_AVATAR_SIZE = 512 * 1024
 
     def __init__(self, tox, friend_number, size, file_number):
         path = profile.ProfileHelper.get_path() + '/avatars/{}.png'.format(tox.friend_get_public_key(friend_number))
         super(ReceiveAvatar, self).__init__(path, tox, friend_number, size, file_number)
-        if exists(path):
+        if size > self.MAX_AVATAR_SIZE:
+            self.send_control(TOX_FILE_CONTROL['CANCEL'])
+        elif exists(path):
             if not size:
                 self.send_control(TOX_FILE_CONTROL['CANCEL'])
                 self.state = TOX_FILE_TRANSFER_STATE['CANCELED']
diff --git a/src/mainscreen.py b/src/mainscreen.py
index 80c2dc2..f02a0c9 100644
--- a/src/mainscreen.py
+++ b/src/mainscreen.py
@@ -21,7 +21,7 @@ class MessageArea(QtGui.QPlainTextEdit):
         elif event.key() == QtCore.Qt.Key_Up and not self.toPlainText():
             self.appendPlainText(Profile.get_instance().get_last_message())
         else:
-            super(self.__class__, self).keyPressEvent(event)
+            super(MessageArea, self).keyPressEvent(event)
 
 
 class MainWindow(QtGui.QMainWindow):
@@ -391,28 +391,29 @@ class MainWindow(QtGui.QMainWindow):
 
 
 class ScreenShotWindow(QtGui.QWidget):
-    # TODO: make selected area transparent
+
     def __init__(self):
         super(ScreenShotWindow, self).__init__()
         self.setMouseTracking(True)
         self.setWindowFlags(self.windowFlags() | QtCore.Qt.FramelessWindowHint | QtCore.Qt.WindowStaysOnTopHint)
         self.showFullScreen()
-        self.setWindowOpacity(0.01)
+        self.setWindowOpacity(0.4)
         self.rubberband = QtGui.QRubberBand(QtGui.QRubberBand.Rectangle, None)
 
     def mousePressEvent(self, event):
         self.origin = event.pos()
-        self.rubberband.setGeometry(
-            QtCore.QRect(self.origin, QtCore.QSize()))
+        self.rubberband.setGeometry(QtCore.QRect(self.origin, QtCore.QSize()))
         self.rubberband.show()
         QtGui.QWidget.mousePressEvent(self, event)
 
     def mouseMoveEvent(self, event):
         if self.rubberband.isVisible():
-            self.rubberband.setGeometry(
-                QtCore.QRect(self.origin, event.pos()).normalized())
-        QtGui.QWidget.mouseMoveEvent(self, event)
-        self.repaint()
+            self.rubberband.setGeometry(QtCore.QRect(self.origin, event.pos()).normalized())
+            left = QtGui.QRegion(QtCore.QRect(0, 0, self.rubberband.x(), self.height()))
+            right = QtGui.QRegion(QtCore.QRect(self.rubberband.x() + self.rubberband.width(), 0, self.width(), self.height()))
+            top = QtGui.QRegion(0, 0, self.width(), self.rubberband.y())
+            bottom = QtGui.QRegion(0, self.rubberband.y() + self.rubberband.height(), self.width(), self.height())
+            self.setMask(left + right + top + bottom)
 
     def mouseReleaseEvent(self, event):
         if self.rubberband.isVisible():
@@ -420,17 +421,23 @@ class ScreenShotWindow(QtGui.QWidget):
             rect = self.rubberband.geometry()
             print rect
             p = QtGui.QPixmap.grabWindow(QtGui.QApplication.desktop().winId(),
-                                         rect.x() + 3,
-                                         rect.y() + 3,
-                                         rect.width() - 6,
-                                         rect.height() - 6)
+                                         rect.x() + 4,
+                                         rect.y() + 4,
+                                         rect.width() - 8,
+                                         rect.height() - 8)
             byte_array = QtCore.QByteArray()
             buffer = QtCore.QBuffer(byte_array)
             buffer.open(QtCore.QIODevice.WriteOnly)
             p.save(buffer, 'PNG')
-            Profile.get_instance().send_screenshot(''.join(byte_array[i] for i in xrange(byte_array.length())))
+            Profile.get_instance().send_screenshot(str(byte_array.data()))
             self.close()
 
+    def keyPressEvent(self, event):
+        if event.key() == QtCore.Qt.Key_Escape:
+            self.rubberband.setHidden(True)
+            self.close()
+        else:
+            super(ScreenShotWindow, self).keyPressEvent(event)
 
 
 
diff --git a/src/notifications.py b/src/notifications.py
index 294e558..3987e63 100644
--- a/src/notifications.py
+++ b/src/notifications.py
@@ -2,7 +2,7 @@ from PySide import QtGui, QtCore
 from PySide.phonon import Phonon
 from util import curr_directory
 # TODO: make app icon active
-# TODO: add all sound notifications
+# TODO: rewrite sound notifications
 
 
 SOUND_NOTIFICATION = {