plotting problems on classdef branch

[Richard Crozier]

I have recently built the classdef branch tip (yesterday), actually this 
is on a colleague's machine so I cannot report the ID right now. It was 
built in Ubuntu 13.04 running in VirtualBox on a windows host.Building 
proceeded fine, make check reporting a small number of failures, I think 
these were known failures.

The problem is, if a plot is attempted an error is reported from gnuplot 
about x11 server, I don't have the exact message, but it is similar to this

http://stackoverflow.com/questions/13786754/octave-gnuplot-aquaterm-error-set-terminal-aqua-enhanced-title-figure-1-unk

The odd thing is, if I attempt to get around the problem by doing

graphics_toolkit("fltk")

I still get the same error, gnuplot still being called. I have confirmed 
the choice by running 'graphics_toolkit' which reports 'fltk', so it is 
as though the choice is ignored, fltk is listed in the available 
graphics toolkits reported by 'available_graphics_toolkits', but I 
didn't see the output of configure to check if it reported anything 
related to this.

My question is, is this a known issue (perhaps fixed on default), or 
should I investigate further to file a proper bug report?

Richard

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