I'm using Mac OS X 10.10.1 on an older Mac running the latest Safari although the issue is also happening on Windows with Firefox. I just upgraded to the latest instal of CKEditor, which didn't fix this problem.
The editor is in a table and all works good except for the spell checker. When I open it up, , the window is about twice as wide as the browser window -- to the extent that the cancel button is all the way off the screen and I have to scroll to it. It doesn't matter what I type into the editor -- even a couple of the same letter and then spell check and it's huge.
I've included an image that shows the editor in the background and just how big the spell checker window is. The grey rectangles in the lower part of the image are actually the change to/all/add word/finish checking buttons
Any ideas? Can the width be configured?
[EDIT] I've checked each of the different options that pull up a window and the same problem (although to a lesser degree) as above exists for the table builder and special characters window as well. In both of those, the buttons are the normal size.
This doesn't happen on the ckeditor.com site, so I'm not sure what's causing it now. I had posted to support and it disappeared.