I have flask webservice running on windows, run up with `app.run()` which works fine from Chrome but when accessed with IE it sometimes fails with a timeout error. I've managed to reproduce the problem without flask which suggests there is (maybe?) some problem in the underlying Python networking code that flask is using. I've attached a simple website that displays the problem using only SimpleHTTPServer. To reproduce the problem unzip the file, cd into the directory and start the server using:

python -m SimpleHTTPServer 5001

Then visit http://localhost:5001 in Internet Explorer and it will timeout, usually within the first 20 or 30 ajax calls.

I'm using IE11 on windows 7 and python 2.7.8