I have an odd problem no one here can seem to help with. I am producing box line plots using polyfill to create and fill the boxes. I have the correct x coordinates for each box. When I produce a gif or png plot directly, I get lines of different apparent widths for each year in my timeseries. If I produce a postscript plot instead and then convert it using "xv" and then save the gif output, the lines look fine. If I convert the plot with convert, I get uneven lines. It seems like some kind of resolution issue but I'm not sure how to fix it. I do know my polyfill command is correct. I want gif or png output and I need to create the plots automatically so I can't do the xv conversion. Any ideas? I can post some code if necessary.