gnuplot and dvipdfm

dvipdfm doesn't correctly handle an eps figure whose lower-left corner is not at (0,0). To solve this problem, you need change -dEPSCrop to -sPAPERSIZE=jisb0 /dvipdfm/config/config

see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=428014