Re: FW: default buffer-enable-undo

[Richard Stallman]

I can't reproduce the problem with today's build.
In order for C-I as the first character to actually
insert a tab, I have to visit a file (emacs -q ~/foo).
When I do this, undo works properly and deletes the space.

I can't go firther without a precise test case.  Please read the Bugs
section in the Emacs manual, which provides guidelines on how to write
a bug report to give us the necessary information so we can fix the
bug.