User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0
The problem was that the file was being read as ISO-8859-1 instead of
UTF-8, and then a pre-processor was replacing the 0x85 byte (0x0085 is
new-line), with 0x0a before returning it through jetty. So this was not
a jetty problem at all.