When using net-proxy/squid-2.5.10-r4 under havy load it disconnects randomly clients that are downloading something trough it. It doesn't happen with net-proxy/squid-2.5.10-r2. Disconnected clients get "Connection closed" error and there is no evidence of such behavior in squid logs.
please try net-proxy/squid-2.5.11 and see if you still have same problem.
That version works fine. Thanks.
fixed by 2.5.11 then