zero sized replay

["Riccardo Castellani" <ric.castellani@xxxxxxxx>]

I have squid 2.5 stable and I often obtain "zero sized replay" to visit 
specific sistes both by I.E. and Firefox.
My squid traffic is deteted from another machine where a transparent proxy B 
forwards again requests to Internet.

I tried to use only Squid or only proxy B and in both cases the site worked 
fine.
If I enable both proxy in certain sites I have: zero sized replay

What do you think ?