> > Backspace works as expected, however.
> I'm afraid that as of org-20160516 on ELPA, backspace also does not
> overwrite whitespace.


Oh, it seems like backspace works fine in text modes like
fundamental-mode and message-mode, but not prog-derived modes. I'd say
that's another bug.

A git bisect says that this commit by Bastien Guerry is the culprit:
f0a64ab3b5c46c8c7b1c838de2ed20511357e43d

Does anyone know why it also affects orgtbl-self-insert-command?