Guy Wiener <wiener.guy@gmail.com> writes:

Hi, Guy,

> When the cursor crosses the edge of the
> frame, instead of placing a "long line" marker and moving to the next
> line, the entire buffer is shifted to the left and the cursor remains
> on the same line.

> Can this behavior be disabled, and replaced the the same behavior as
> in fundamental text editing? It is really annoying, especially when
> using auto-fill mode.

M-x toggle-truncate-lines          does help?

so that "Truncate long lines disabled".

Or place in your .emacs:
(setq truncate-lines t)

cheers,
Giovanni