I have installed CKEditor exactly like in readme instructions, but it wasn't work. CKEditor wasn't show up at any pages of the site. Also it was not show sample toolbar on it's own configure pages (Default, Advanced profiles).

I have spent 4 hours to find out what happening. Finally I was found solution. It wasn't CKEditor itself, it was about Java. It just won't work as it should be. Than I have install JQuery module and all works!

So now I'm confused. Why jQuery Update module is not in dependencies of CKEditor?