diff --git a/ajaxuploader/backends/s3.py b/ajaxuploader/backends/s3.py
index c0b7004..ab56237 100644
--- a/ajaxuploader/backends/s3.py
+++ b/ajaxuploader/backends/s3.py
@@ -1,5 +1,5 @@
 from multiprocessing import Pool
-from StringIO import StringIO
+from io import StringIO
 
 import boto
 from django.conf import settings
diff --git a/ajaxuploader/signals.py b/ajaxuploader/signals.py
index 4e8daa0..e8a64b4 100644
--- a/ajaxuploader/signals.py
+++ b/ajaxuploader/signals.py
@@ -1,4 +1,4 @@
 from django.dispatch import Signal
 
 
-file_uploaded = Signal(providing_args=['backend', 'request'])
+file_uploaded = Signal()
diff --git a/ajaxuploader/views/base.py b/ajaxuploader/views/base.py
index 67e5f4d..bca56b5 100644
--- a/ajaxuploader/views/base.py
+++ b/ajaxuploader/views/base.py
@@ -32,8 +32,10 @@ def _ajax_upload(self, request, *args, **kwargs):
                 try:
                     if 'qqfile' in request.GET:
                         filename = request.GET['qqfile']
+                    elif 'qqfilename' in request.GET:
+                        filename = request.GET['qqfilename']
                     else:
-                        filename = request.REQUEST['qqfilename']
+                        filename = request.POST['qqfilename']
                 except KeyError:
                     return HttpResponseBadRequest("AJAX request not valid")
             # not an ajax upload, so it was the "basic" iframe version with