New features
* Support the new Google Chrome browser.
* Now supports relative file paths for both image and flash files.
* Ability to upload & link to documents files (Word, PDF etc..) via the ‘Insert/Edit Link’ button.
* Email links from the Link dialog are now encoded by default to prevent being harvested by spammers.
* Configuration file is now XML based.
* The SHIFT+SPACE keystroke will now produce a   character.
* Non-breaking space support.
* New International version of the Editor.
* Ability to create, modify and remove DIV containers.
* Added 4 new featured pack tabs (Boarder, Box, List & Positioning) to the iStyles (inline style editor) tool.
* One installation file for both 1.0x & 1.5x version of Joomla!
* File path, media path and flash path configurable through Joomla!
* Ability to change the default font colour.
* Option to allow users types to manages their own media folder.
* Ability to save articles in Safari and Chrome.
Fixes
* Undefined variable: on line 334. - The fix has new been updated and repackaged into the 2.6.3 download. (Sept 18th 2008)
* Jlink & loading fix for 1.0x. It has come to our attention that some Joomla! 1.0x users may be experiencing problems with the editor not loading properly and the Jlink plugin not working correctly. (Sept 18th 2008)

* Erratic behaviour with the insert html tag in Safari and Chrome.
* On Opera and Firefox 3, the entire page was scrolling on SHIFT+ENTER, or when EnterMode='br'.
* On Firefox 3, the entire page was scrolling when inserting block elements with the FCK.InsertElement function, used by the Table and Horizontal Rule buttons..
* Added some hints in editor/css/fck_editorarea.css on how to handle style items that would break the style combo.
* Fixed a JavaScript error in IE which occurs when there are placeholder elements in the document and the user has pressed the Source button.
* Corrected mixed up Chinese translations for the blockquote command.
* Fixed the issue where the show blocks command loses the current selection from the view area when editing a long document.
* Fixed the issue where the fit window command loses the current selection and scroll position in the editing area.
* Fixed the issue where the merge down command for tables cells does not work in IE for more than two cells.
* Fixed the issue where the Find/Replace dialog scrolls the entire page.
* Added warning message about Firefox 3's strict origin policy.
* Improved the garbage filter in Paste from Word dialog.
* Fixed invalid HTML in the Paste dialog.
* Fixed sporadic "FCKeditorAPI is not defined" errors in Firefox 3.
* Fixed access denied error in IE7 when FCKeditor is launched from local filesystem.
* Fixed the type="_moz" attribute that sometimes appear in <br> tags in non-IE browsers.
* Converting multiple contiguous paragraphs to Formatted will now be merged into a single <PRE> block.
* Fixed a data loss bug in IE when there are @import statements in the editor's CSS files, and IE's cache is set to "Check for newer versions on every visit".
*] FCK.InsertHtml() will now insert to the last selected position after the user has selected things outside of FCKeditor, in IE.
* Fixed broken protect source logic for comments in IE.
* Fixed JavaScript error with list commands when the editable document is selected with Ctrl-A.
* Fixed the issue where indent styles in JavaScript-generated <p> blocks are erased in IE.
* Fixed JavaScript error with the "split vertically" command in IE when attempting to split cells in the last row of a table.
* The sample posted data page has now the table fixed at 100% width.
* SpellerPages was causing a "Permission Denied" error in some situations.