This is a maintainance release, consisting mainly of WYSIWYG, rendering and syntax converter enhancements. Other noteworthy changes:

- improved PDF export
- added the ability to configure the SMTP port in the Administration
- fixed a regression with the automatic creation of SkinExtension classes in virtual wikis
- improved French, German, Romanian, Russian and Spanish translations

For more details, see http://www.xwiki.org/xwiki/bin/view/Main/ReleaseNotesXWikiEnterprise183.