diff --git a/src/mcedit2/dialogs/error_dialog.py b/src/mcedit2/dialogs/error_dialog.py
index f162e05..6322330 100644
--- a/src/mcedit2/dialogs/error_dialog.py
+++ b/src/mcedit2/dialogs/error_dialog.py
@@ -12,6 +12,7 @@ from mcedit2.util import qglcontext
 
 from mcedit2.util.load_ui import load_ui
 from mcedit2.util.screen import centerWidgetInScreen
+from mcedit2.util.showprogress import MCEProgressDialog
 
 log = logging.getLogger(__name__)
 
@@ -86,8 +87,8 @@ class ErrorDialog(QtGui.QDialog):
         url = None
 
         progressText = self.tr("Uploading to pastebin...")
-        dialog = QtGui.QProgressDialog(progressText,
-                                       None, 0, 0, self)
+        dialog = MCEProgressDialog(progressText,
+                                         None, 0, 0, self)
         dialog.setLabelText(progressText)
         dialog.setWindowTitle(progressText)
         dialog.setStatusTip(progressText)
diff --git a/src/mcedit2/editorapp.py b/src/mcedit2/editorapp.py
index f591842..50d16d4 100644
--- a/src/mcedit2/editorapp.py
+++ b/src/mcedit2/editorapp.py
@@ -23,6 +23,7 @@ from mcedit2.util.load_ui import load_ui
 from mcedit2.util.objgraphwidget import ObjGraphWidget
 from mcedit2.util.qglcontext import setDefaultFormat
 from mcedit2.util.resources import resourcePath
+from mcedit2.util.showprogress import MCEProgressDialog
 from mcedit2.util.worldloader import LoaderTimer
 from mcedit2.widgets import prefsdialog, configureblocksdialog
 from mcedit2.widgets.blocktype_list import BlockListWidget
@@ -684,11 +685,11 @@ class MCEditApp(QtGui.QApplication):
 
     def loadFile(self, filename, readonly=False):
         self.hideWorldList()
-        fileLoadingDialog = QtGui.QProgressDialog(self.tr("Loading world..."),
-                                                  None,
-                                                  0,
-                                                  1,
-                                                  self.mainWindow)
+        fileLoadingDialog = MCEProgressDialog(self.tr("Loading world..."),
+                                              None,
+                                              0,
+                                              1,
+                                              self.mainWindow)
         fileLoadingDialog.setAutoReset(False)
         fileLoadingDialog.setWindowModality(Qt.WindowModal)
         fileLoadingDialog.setMinimumDuration(0)
diff --git a/src/mcedit2/editorsession.py b/src/mcedit2/editorsession.py
index 54032cd..abf29c5 100644
--- a/src/mcedit2/editorsession.py
+++ b/src/mcedit2/editorsession.py
@@ -27,7 +27,7 @@ from mceditlib.transform import DimensionTransform, SelectionTransform
 from mceditlib.util import exhaust
 from mceditlib.util.lazyprop import weakrefprop
 from mcedit2.util.raycast import rayCastInBounds
-from mcedit2.util.showprogress import showProgress
+from mcedit2.util.showprogress import showProgress, MCEProgressDialog
 from mcedit2.util.undostack import MCEUndoStack
 from mcedit2.widgets.inspector import InspectorWidget
 from mcedit2.worldview.viewaction import UseToolMouseAction, TrackingMouseAction
@@ -617,7 +617,7 @@ class EditorSession(QtCore.QObject):
     def changeResourcePack(self, packName):
         packDisplayName = packName or "(default)"
         log.info("Changing to resource pack %s", packName)
-        dialog = QtGui.QProgressDialog(QtGui.qApp.mainWindow)
+        dialog = MCEProgressDialog(QtGui.qApp.mainWindow)
         dialog.setRange(0, 0)
         dialog.setValue(0)
         dialog.setWindowTitle(self.tr("Changing resource pack..."))
@@ -634,7 +634,7 @@ class EditorSession(QtCore.QObject):
 
     def changeMCVersion(self, version):
         versionDisplayName = version or "(current)"
-        dialog = QtGui.QProgressDialog(QtGui.qApp.mainWindow)
+        dialog = MCEProgressDialog(QtGui.qApp.mainWindow)
         dialog.setRange(0, 0)
         dialog.setValue(0)
         dialog.setWindowTitle(self.tr("Changing Minecraft version..."))
diff --git a/src/mcedit2/util/showprogress.py b/src/mcedit2/util/showprogress.py
index 62bee24..af005db 100644
--- a/src/mcedit2/util/showprogress.py
+++ b/src/mcedit2/util/showprogress.py
@@ -14,6 +14,24 @@ log = logging.getLogger(__name__)
 
 timeBeforeDialog = 0.2
 
+
+class MCEProgressDialog(QtGui.QProgressDialog):
+
+    def __init__(self, *a):
+        flags = Qt.Dialog | Qt.CustomizeWindowHint | Qt.WindowTitleHint | Qt.WindowSystemMenuHint
+        a = a + (flags,)
+        super(MCEProgressDialog, self).__init__(*a)
+
+    def close(self):
+        pass
+
+    def reject(self):
+        pass
+
+    def closeEvent(self, event):
+        event.ignore()
+
+
 def showProgress(text, *tasks, **kwargs):
     """
     Show a progress dialog for the given task(s). Each task should be an iterable,
@@ -35,7 +53,9 @@ def showProgress(text, *tasks, **kwargs):
     shown = False
     with LoaderTimer.stopCtx():
 
-        dialog = QtGui.QProgressDialog(QtGui.qApp.mainWindow)
+        dialog = MCEProgressDialog(QtGui.qApp.mainWindow)
+        if not cancel:
+            dialog.setCancelButtonText(None)
         dialog.setWindowTitle(text)
         dialog.setWindowModality(Qt.WindowModal)
         log.info("Starting progress: %d tasks." % len(tasks))