I suppose you are referring to the WYSIWYG editor and by "update" you mean taking the editor from a newer version of XWiki Enterprise and using it on an older version. Is that so? Then it might not work because the newer version of the editor requires sometimes newer APIs that are provided only by the newer version of XWiki Enterprise. Anyway, are you sure the tab issue is fixed in the newer version? I see http://jira.xwiki.org/browse/XWIKI-6123 is still open, for Chrome, and I didn't commit any fix for it. So unless the browser behaviour has changed, in which case you don't need to upgrade the editor, the problem should still be present in the last version of XWiki Enterprise. But for the record, upgrading the WYSIWYG editor code has two steps: * upgrade the WYSIWYG editor jars in WEB-INF/lib (xwiki-platform-wysiwyg-*) * replace the resources/js/xwiki/wysiwyg/xwe folder (delete and copy the new one) Hope this helps, Marius On Tue, Aug 28, 2012 at 1:48 AM, Boudjelda Mohamed Said <bmscomp(a)gmail.com> wrote: