I was just putting the final touches on content in a large, Custom HTML field.  I accidentally pasted a URL in the body of the editor instead of in the the Add Link box.  I used the normally handy CTRL+Z to undo it and it WIPED my content.  Gone.  I tried CTRL+V in case I accidentally (wishfully) hit CTRL+X, but alas, it was just my URL.

I'm not sure the best solution - the autosave is nice and I haven't had issue with it until now.  But it makes these kind of mistakes undo-able.  If there's an "undo" button (at least in the Custom HTML fields editor) that might suffice.  Or, have a Save button in the Custom Field part? 

And if anyone knows how I can get my content back - I'm all ears!  I'll begin typing again...