bizarre plotting behavior

[Ron Crummett]

Hello all -

I have noticed some rather bizarre behavior when I try to plot multiple 
plots in a subplot window.  As an example:

subplot(211);
plot(rand(1, 100));
hold on
plot(rand(1, 100));
hold off
subplot(212);
plot(rand(1, 100));
hold on
plot(rand(1, 100));
hold off

The first time I run something like this it works fine:  two subplot 
windows, each with two data vectors plotted.  What gets weird is when I 
try to run it again:

oneplot();
clf;
subplot(211);
plot(rand(1, 100));
hold on
plot(rand(1, 100));
hold off
subplot(212);
plot(rand(1, 100));
hold on
plot(rand(1, 100));
hold off

The second time (and all subsequent times) the upper subplot window 
plots the first data vector, then clears and plots only the second data 
vector, despite my command to hold the first plot.  The lower subplot 
window still works fine with both data vectors plotted.  All additional 
plot windows that I open do the same thing, keeping only the second data 
vector in the upper window.  Nothing I can think of to do fixes this 
except exiting and then re-entering Octave.

Has anyone else seen something like this?  I am using 2.9.6 on kubuntu 
breezy with gnuplot 4.0.

Thanks.

-Ron