It's a very minor thing, but whenever I toggle italic on in the editor extra spacing will appear around the italicized text. This doesn't occur if you highlight text and toggle italic on/off, only if you do it without any text selected. I don't think the extra spacing will persist in the actual text you submit, and the extra spacing seems to disappear any time you press backspace.
Chrome 40.0.2214.115, OS X 10.10.2
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