On Thu, 17 Apr 2008, Hélio Guilherme wrote:
 Please reproduce the BUG:
 Create a chart, for example a time-series.
 Right click over it, and Save as a PNG... 
To get some more information on this, can you try each of the 
following commands in your gnuplot version and see which ones 
succeed or fail:
set term pngcairo
set term png color
set term png truecolor
It would also be useful to have the output of the gnuplot command 
"set term".
Thanks!
Allin.