Cool to see new updates for the WYSIWYG editor, but it's still not great. Let's say there's the following quote:

Hello world!

Blah blah blah

Normally, I like to trim the junk out of the quote and only quote exactly what I'm responding to. Using the editor, I'd trim out the "Hello world!" part, for example (note I've only reproduced this bug when trimming the first line(s) of a quote) and try to just get:

Blah blah blah

However, when I delete that "Hello world!" line the entire quote block is deleted and I'm just left with an unquoted "Blah blah blah" in the editor. Try it.

Also: OS X 10.8.2 and Chrome Version 24.0.1312.56