Crawl Web user agent is always Java/1.7_11

Hello to the community.

Trying to crawl a website, i always get the mobile version of this site.
I thougth about an issue with the user agent, so I changed the user agent parameter in the Crawl Web process, but still get the same result.
I then tried to crawl the page http://whatsmyuseragent.com/ with the following parameters:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.3.008">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="5.3.008" expanded="true" name="Process">
    <parameter key="logverbosity" value="init"/>
    <parameter key="random_seed" value="2001"/>
    <parameter key="send_mail" value="never"/>
    <parameter key="notification_email" value=""/>
    <parameter key="process_duration_for_mail" value="30"/>
    <parameter key="encoding" value="SYSTEM"/>
    <parameter key="parallelize_main_process" value="false"/>
    <process expanded="true">
      <operator activated="true" class="web:crawl_web" compatibility="5.3.000" expanded="true" height="60" name="Crawl Web" width="90" x="45" y="30">
        <parameter key="url" value="http://whatsmyuseragent.com/"/>
        <list key="crawling_rules"/>
        <parameter key="write_pages_into_files" value="true"/>
        <parameter key="add_pages_as_attribute" value="false"/>
        <parameter key="output_dir" value="C:\temp"/>
        <parameter key="extension" value="html"/>
        <parameter key="max_depth" value="0"/>
        <parameter key="domain" value="web"/>
        <parameter key="delay" value="1000"/>
        <parameter key="max_threads" value="1"/>
        <parameter key="max_page_size" value="100"/>
        <parameter key="user_agent" value="rapid-miner-crawler"/>
        <parameter key="obey_robot_exclusion" value="true"/>
        <parameter key="really_ignore_exclusion" value="false"/>
      </operator>
      <connect from_op="Crawl Web" from_port="Example Set" to_port="result 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
    </process>
  </operator>
</process>

and the C:\Temp\0.html file i get reports my user agent to be Java/1.7.0_11, and this whatever i set in the user agent field..

I'm on a Windows 8 x64 machine, using RapidMiner 5.3.008 and Web Mining Extension 5.3.0

Any advice?
Thank you
n0n0