Gnuplot mouse half-working

[Francesco Potorti`]

On Debian, Gnuplot behaves strangely for me in Octave 3.0 and 3.1 (I am
almost sure it used to work sometime).  Keyboard commands are understood
(q, v, m, 1, 2 and others), but l (which should toggle log y scale) does
not work, and selecting a zoom region with the mouse does not work.  But
the mouse works, in fact I see the pointer coordinates in the lower-left
corner of the windows.  If I enable the v (verbose) mode and hit l,
Gnuplot tells me that it's toggling log mode, but the display does not
change, even after hitting e (redraw).

I have 'set mouse' in ~/.gnuplot, I use Octave 3.0.1 and 3.1.52 and
Gnuplot 4.2.4.

With Octave 2.1, everything works as expected, and moreover the Gnuplot
window has decorations and buttons.

Am I missing anything obvious?  Is this a Debian packaging bug, and
Octave bug, a Gnuplot bug?

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