In case you are interested in using the latest version of ckeditor which looks cooler and can be customized i have the following stepos for you to follow and enjoy:
1- Costumize and donwload the latest version of ckeditor from here:http://ckeditor.com/builder
2- From the directory where the wysiwyg-editor plug in is installed (...\qa-plugin\wysiwyg-editor)
delete everything except qa-*.php files (make sure you keep copy the changes you have made in config.js before removing it)
3- unzip and copy the entire new version of ckeditor 4.0 into that directory (...\qa-plugin\wysiwyg-editor)
4- goto qa-theme.php and replace (\question2answer\qa-theme\Snow\qa-theme.php)
'qa_wysiwyg_editor_config.skin="kama";',
with
'qa_wysiwyg_editor_config.skin="moono";',
5- reload your application to see the changes already, you sould be able to get the new look of ckeditor
6- now, reapply all the costumizations and changes you had in your old config.js(from step 2).
That's it, Enjoy :)
Remember: If you are using other themes than Snow, you have to apply the changes in step4, otherwise you dont see anything(editor will not be displayed in ask question page)