Thread:Talk:Download/The connection was reset/reply (9)

Well, I did resolve this error, looking in Firefox:

The connection was reset The connection to the server was reset while the page was loading. ....

and in Chromium: No data received Unable to load the webpage because the server sent no data. Error code: ERR_EMPTY_RESPONSE

by removing/disabling the php opcache module. (e.g. in /etc/php5/apache2/conf.d/05_opcache.ini in Ubuntu 13.10)

For me this did solve the problem completely!