[pstricks] rotation oddity

[Michael Sharpe]

The following simple file, when compiled on my system with latex,  
dvips and ps2pdf, exhibits behavior I do not recall seeing previously.

\documentclass[dvips,10pt]{article}
\usepackage{pstricks}
\listfiles
\begin{document}
\psset{unit=1in}
\begin{pspicture}(0,0)(3,5)
\rput[Bl]{90}(2,2){Test}
\end{pspicture}
\end{document}

With a rotation angle equal mod 180 to 90, the resulting .pdf is in  
landscape mode. If even slightly different (eg, 90.01), the result is  
as expected---not landscape. I'm using MacTeX 2008---essentially,  
TeXLive 2008. Does this happen on other systems with a recent  
pstricks? Any ideas?

Michael

*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)
pstricks.sty    2008/11/26 v0.40 LaTeX wrapper for `PSTricks' (RN,HV)
pstricks.tex    2009/01/25 v1.27 `PSTricks' (tvz,hv)
   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)