[FF]:It is impossible to exit styled list with Enter Key.

[Jakub Ś]

1. Open replacebycode.html sample
2. Clear page and and click on one of list buttons to insert list
3. Type "test1", Hit Enter, "test2", Hit Enter, "test3" and then stop
4. Select font-size 16px from Size dropdown
5. Click behind 3 in test3 to change selection
6. Press Enter, press Enter and so on

Result: Items get created and you can leave the list that way.

NOTES:

1. This won't work with pasted list into source
2. This is reproducible only in Firefox from CKEditor 4.0