id summary reporter owner description type status priority milestone component version resolution keywords cc 11283 Error on particular content. Marcus Bointon "This bug was originally reported [http://ckeditor.com/forums/CKEditor/CKEditor-error-with-particular-content here]. Here's a really simple, minimal example of a CKEditor page, using a fresh download of 4.3, and it works fine: {{{ }}} Now add 'text-align: center;' to the inline style in the textarea content so it becomes this: {{{ }}} CKEditor now fails to run on load, giving this error, and leaving the editor unresponsive: {{{[Error] TypeError: 'null' is not an object (evaluating 'a.previous=this.previous') replaceWith (ckeditor.js, line 249) upcast (ckeditor.js, line 1016) (anonymous function) (ckeditor.js, line 979) forEach (ckeditor.js, line 264) forEach (ckeditor.js, line 264) (anonymous function) (ckeditor.js, line 978) j (ckeditor.js, line 10) (anonymous function) (ckeditor.js, line 12) fire (ckeditor.js, line 13) toHtml (ckeditor.js, line 285) setData (ckeditor.js, line 763) (anonymous function) (ckeditor.js, line 327) j (ckeditor.js, line 10) (anonymous function) (ckeditor.js, line 12) fire (ckeditor.js, line 13) setData (ckeditor.js, line 239) b (ckeditor.js, line 759) (anonymous function) (ckeditor.js, line 761) setMode (ckeditor.js, line 313) (anonymous function) (ckeditor.js, line 308) j (ckeditor.js, line 10) (anonymous function) (ckeditor.js, line 12) fire (ckeditor.js, line 13) fireOnce (ckeditor.js, line 12) fireOnce (ckeditor.js, line 13) (anonymous function) (ckeditor.js, line 234) l (ckeditor.js, line 214) u (ckeditor.js, line 214) s (ckeditor.js, line 214) (anonymous function) (ckeditor.js, line 215) }}} If I take out the text-align style, it works again. I've no idea why it should break like that, I'm assuming it's a bug. I attach my build-config.js file." Bug new Normal General 4.3