diff --git a/netlib/http/exceptions.py b/netlib/http/exceptions.py
index 45bd2dce5..7cd26c122 100644
--- a/netlib/http/exceptions.py
+++ b/netlib/http/exceptions.py
@@ -1,5 +1,6 @@
-class HttpError(Exception):
+from netlib import odict
 
+class HttpError(Exception):
     def __init__(self, code, message):
         super(HttpError, self).__init__(message)
         self.code = code
@@ -9,12 +10,13 @@ class HttpErrorConnClosed(HttpError):
     pass
 
 
-
 class HttpAuthenticationError(Exception):
     def __init__(self, auth_headers=None):
         super(HttpAuthenticationError, self).__init__(
             "Proxy Authentication Required"
         )
+        if isinstance(auth_headers, dict):
+            auth_headers = odict.ODictCaseless(auth_headers.items())
         self.headers = auth_headers
         self.code = 407
 
diff --git a/netlib/http/http1/protocol.py b/netlib/http/http1/protocol.py
index a189bffcb..2e85a762e 100644
--- a/netlib/http/http1/protocol.py
+++ b/netlib/http/http1/protocol.py
@@ -302,7 +302,8 @@ class HTTP1Protocol(semantics.ProtocolMixin):
             bytes_left = expected_size
             while bytes_left:
                 chunk_size = min(bytes_left, max_chunk_size)
-                yield "", self.tcp_handler.rfile.read(chunk_size), ""
+                content = self.tcp_handler.rfile.read(chunk_size)
+                yield "", content, ""
                 bytes_left -= chunk_size
         else:
             bytes_left = limit or -1