Sitecore Preview.ResolveSite

In Sitecore version 8.1 Sitecore has added the Preview.ResolveSite as a standard config setting. Previously, it was a hotfix ever since the initial release from Sitecore v. 6.6.0 up to Sitecore v. 8.0  https://kb.sitecore.net/articles/382913.

It is now a part of the standard settings, though it is set not to resolve site by default…

<!--  PREVIEW - RESOLVE SITE
  If false, the Preview.DefaultSite setting specifies the context site to use when a user previews an item.
  If true, when a user previews an item, Sitecore tries to resolve the root item and the context site based on the current content language
            and the path to the item. If Sitecore cannot resolve the context site, it uses the site that is specified in the Preview.DefaultSite setting.
            Default value: false (use the value of the Preview.DefaultSite setting)
      -->
    <setting name="Preview.ResolveSite" value="false"></setting>