NGINX Reverse Proxy : Many html status code 400 responses, why?

Question

We have recently implemented a nginx based reverse proxy.

While, debugging our access logs, we are seeing quite a bit of status code 400 results.

They look somet

Answer 1

I found this was caused by using Chrome, which apparently opens extra connections occasionally without sending any data.

Here's some more info: http://www.ruby-forum.com/topic/2953545

Now the question is what to do about them - the answer provided there wasn't very satisfying.