[pstricks] axes labels missing

[Markus]

Hi!

Without any warning the labels disappeared. But only for y and z and 
negative x. Looks strange.

\listfiles
\documentclass{article}
\usepackage{pst-3dplot,pstricks-add}
\begin{document}

\centering
\begin{pspicture}(-8,-8)(8,8)
\pstThreeDCoor[xMin=-6,yMin=-9,zMin=-1,
                xMax=10,yMax=8,zMax=12,
                nameX=$x_1$,nameY=$x_2$,nameZ=$x_3$,
                IIIDticks=true,IIIDxticksep=-1,
                ,linewidth=1pt,drawing=true,linecolor=black]
\end{pspicture}
\end{document}

  *File List*
  article.cls    2005/09/16 v1.4f Standard LaTeX document class
   size10.clo    2005/09/16 v1.4f Standard LaTeX file (size option)
pst-3dplot.sty    2006/02/07 package wrapper for pst-3dplot.tex (hv)
pstricks.sty    2008/10/31 v0.39 LaTeX wrapper for `PSTricks' (RN,HV)
pstricks.tex    2008/07/31 v1.26 `PSTricks' (tvz)
   xcolor.sty    2007/01/21 v2.11 LaTeX color extensions (UK)
    color.cfg    2007/01/18 v1.5 color configuration of teTeX/TeXLive
    dvips.def    1999/02/16 v3.0i Driver-dependant file (DPC,SPQR)
pst-3dplot.tex    2008/11/12 v1.82 `PST-3dplot' (hv)
pst-xkey.tex    2005/11/25 v1.6 PSTricks specialization of xkeyval (HA)
  xkeyval.sty    2008/08/13 v2.6a package option processing (HA)
  xkeyval.tex    2008/08/13 v2.6a key=value parser (HA)
pstricks-add.sty    2007/09/03 v. 0.11 package wrapper for 
pstricks-add.tex (hv)
pstricks-add.tex    2008/11/12 v1.82 `PSTricks-add' (hv)
  ***********

Have I missed something? I've updated to latest Miktex yesterday.

Thanks for any help in advance!

Markus