IE9 - H1 text copied from CKE cannot be pasted in CKE - JS Error.

[Joel]

Reproducible in IE9 ​http://nightly.ckeditor.com/13-04-04-14-51/standard/samples/replacebyclass.html

1. Go to the link
2. Doubleclick "Apollo" word to select it
3. Ctrl-C to copy
4. Attempt to paste anywhere --> Error

Error in IE9 Console: Ominaisuuden remove arvoa ei voi noutaa: objekti on tyhjäarvoinen, tai sitä ei ole määritetty ckeditor.js, rivi 301 merkki 144 (The generic undefined error for "remove")

Not sure if this is related to one of the Many other paste issues.

[Piotrek Koszuliński]

Reproducible from ​git:da6c3d65.

Error msg (PL):

SCRIPT5007: Nie można uzyskać właściwości „remove”: obiekt jest pusty lub niezdefiniowany 
editable.js, wiersz 1141 Znak 5

[Piotrek Koszuliński]

Will be fixed by #10260.

[Olek Nowodziński]

This issue has been fixed along with #10260.