Comment # 7 on bug 961864 from Johannes Meixner

That
"from the CUPS web interface, and the double-sided test page came out well"
indicates that what your particular PostScript printer does not like
is the PostScript that is "%Produced by poppler pdftops version: 0.24.4"
when doing "date |lp -d TA3060".

Accordingly I re-assign this issue to the openSUSE maintainers
of poppler:
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$ osc maintainer poppler
Defined in package: X11:common:Factory/poppler 
  bugowner of poppler : 
   Zaitor
  maintainer of poppler : 
   Zaitor, sumski, group:gnome-maintainers

$ osc whois Zaitor
Zaitor: "Bj�rn Lie" <zaitor@opensuse.org>
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FYI
regarding PostScript from poppler that results PostScript errors
on PostScript printers, cf. bug#774627