I know, there is a shortcut for “Save Draft” in “basic mode” (Accesskey D) – but my preferred mode is “dynamic mode” – and Accesskey D does something else in Chrome on the Mac – it deletes a character on the right side of the text cursor.
In file editors I save the current state using a keyboard shortcut, in horde I can not do that, that’s a pity – it’s quite important for me – every now and then horde logs me out and I loose the e-mail I have been writing.
At least there is an advanced feature to get drafts auto-saved every minute.