[Gnuplot-info] Problem with terminal png and jpeg

[Jason <gn...@co...>]

I'm not entirely sure where to look here. This may be a bug or a 
configuration issue. This is with gnuplot 4.0 patchlevel 0 on Gentoo Linux.

I'm trying to plot some graphs with GNU plot to a graphic file. For both 
'png' and 'jpeg' terminal type, the plot comes out incorrect. When I use 
the x11 terminal, things look fine.

The background is black. The text does not appear (I imagine that it is 
black as well so it's just not visible).

Here's a sample data and command.

--- values.txt
1 233 233.00 180 233.00
2 235 234.05 180
3 231 232.93 180
4 230 232.08 180
5 229 231.32 180 231.32
---

--- gnuplot.cmds
set terminal jpeg medium size 800x600
set yrange [170:*]
set bars 0.0
plot 'values.txt' using 1:3 with lines notitle, '' using 1:2 notitle, '' 
using 1:2:2:3:3 with candlesticks notitle, '' using 1:4 with lines 
notitle, '' using 1:5 with lines title 'Trend: -2.3 / week'
---

You can see a sample of this output at
http://www.cougarcorp.net/gnuplot-problem/gnuplot.jpg

Even the basic 'test' doesn't work right:
--- gnuplot.cmds
set terminal jpeg medium size 800x600
test
---
http://www.cougarcorp.net/gnuplot-problem/gnutest.jpg

Is it a library problem? And I doing something incorrect? Have I found a 
bug? I'm not quite sure, so comments and suggestions are more than welcome.

Thanks

Jason