Seriously? Why no-repeat twice? Makes it useless in FF and IE, gracefully chrome ignores the stupidity of inserting no-repeat twice.
It's a pity that you have used review to report a bug in the editor, that's not the best place to report issues with CKEditor or suggest new features that are outside of the scope of Joomla! extension
Please use the following URL to report a bug in CKEditor:
remember to read an instruction on howto report a bug:
This way we'll be able to handle it properly.
In short we need a detailed set of steps to reproduce the issue (with initial HTML source, expected result) along with the editor version and your browser/OS. We've tried to reproduce the issue reported in this and previous comment without luck, so we'll not manage to fix it unless you provide some more details on it.
Thank you for taking your time to write a review and test our extension and I hope that you'll give CKEditor another chance soon ;-)