So, I have reproduced the normal hot key issues in the ingame message system. This isn't technically a bug but due to the way HTML5 functions differently than Flash. I will bring this up as an improvement.
Unless you have a rationale to explain why the editor behaviour was changed, I beg to differ and this is technically a bug because it breaks the expectations of your users based on: 1) the behaviour of the system since its inception up until the change to the HTML5 editor and 2) the behaviour incompatibility with any other (known to me) text editor (web based or not).
Well, that just to say that (based also on this thread) for the few of us using mostly the keyboard to move around in the text area, the way the shortcuts work is rather annoying and unnatural.
Thanks for bearing with me until the end.