anchor.diff:  
   <h4>Note</h4>
   
  -A more comprehensive list of changes for this release can be found <%= link_to_full_changelog 'here.', 'Release 18.4' %>
  +A more comprehensive list of changes for this release can be found <%= link_to_full_changelog 'here.', 'Release 18.6' %>
   
   Have ideas and want to contribute? Need some help getting started? We're here to help. Reach out to us at <%= mail_to 'support@thoughtworks.com' %>.
   
  
positive.code:   * The <%= link_to_versioned_api '18.2.0', 'plugin-info', 'Plugin Info API' %> v3 has been deprecated as part of 18.3.0. This version of the API will be removed in a release scheduled for July 2018. Version 4 of the API is available, and users are encouraged to use it.
  
  
  <h4>Breaking changes</h4>
  
    * The [Agent Docker Image for Debian 7](https://github.com/gocd/docker-gocd-agent-debian-7) will not be built with newer version of GoCD. Users wanting to build a gocd agent image for debian 7 can fork [the repository](https://github.com/gocd/docker-gocd-agent-debian-7) to build an image.
  
  <h4>Known Issues</h4>
  
  * There are a few known minor issues when triggering pipelines on the new dashboard:
    * <%= link_to_issue 4647, 'Trigger buttons do not get disabled if the pipeline was force triggered and material update is in progress' %>
    * <%= link_to_issue 4452, 'Horizontal scroll appears in Trigger With Options Materials popup' %>
    * <%= link_to_issue 4481, 'CCTray corner cases: NullPointerException because of a pipeline not being in the config when the dashboard looks to update itself.' %>
  
  <h4>Contributors</h4>
  <%= [
    "Aditya Sood",
    "Akshay Dewan",
  
negative.code: <h4>Improvements</h4>
  
    * <%= link_to_commit '3541529f60044fec297f42efce08ca65d14651ad', 'Upgrade to TFS SDK version 14.118.0.' %>
    * <%= link_to_commit 'ebdfb7dff06029d03198740701a6ef7e74482a31', 'Do not log server info at shutdown.' %>
  
  
  <h4>Library upgrades</h4>
  
    In order to move towards supporting JRE version 9 and upwards, this release upgrades several libraries used by GoCD, including spring, hibernate, mybatis.
  
  
  <h4>Breaking changes</h4>
  
    * APIs now respond with an HTTP status code 403(Forbidden) instead of the 401(Unauthorized) when authenticated users are not authorized to view or perform operations on a resource.
    * Stricter URL escaping and normalization
  
  
  <h4>Bug fixes</h4>
  
    * <%= link_to_issue 4737, 'Secure variables that were not masked in task plugins are now masked properly.' %>
    * <%= link_to_issue 4805, 'Pipeline history page pagination was broken.' %>
    * <%= link_to_issue 4757, 'Fix Mac installer to use Java 1.8 only.' %>
    * <%= link_to_issue 4751, 'Fix incorrect cache key generation.' %>
    * <%= link_to_issue 4746, 'Fix issue with user preferences page on Microsoft Edge browser.' %>
    * <%= link_to_issue 4338, 'QuickEdit does not allow delete of only stage in pipeline.' %>
  
  
  <h4>Deprecations</h4>
  
  