Duplex problem

[stelmo at savba.sk]

This is a summary of what I have found out so far

1) The duplex is ok for text and other format files
so it seems that the problem is with the ps files only

2) with a file produced with dvips (from a dvi file) I get no duplex
with the same file after I had run ps2ps I get one blank page

3) if I replace pstops filter of cups 1.1.20 with the filter from
the 1.1.14 release I get duplex right.


I run debian sarge, cups version 1.1.20, printer is xerox phaser 6250dp and I use win's ppd.