[pstricks] pstricks-add breaks latex-beamer?

[Hendri Adriaens]

> you need beamer 3.0 which is not compatible with your one ... :-(

The error is very simple. beamer uses \define at key in a way that
has been reserved for xkeyval 1.7:
\setkeys{beamercolbox}{%
  wd=\textwidth,ht={},dp={},%
  leftskip=0pt,rightskip=0pt plus1fil,%
  sep=0pt,colsep=0pt,colsep*=0pt,%
  shadow=false,rounded=false,ignorebg=false}%

colsep*=0pt: this notation is used by xkeyval to save values
to a macro and further execute the colsep key. But beamer
defines this as a separate key:
\define at key{beamercolbox}{colsep*}{\def\beamer at colbox@colseps{#1}}

I checked for this at the time I was developing the new xkeyval
syntax and there where no problems. In the meantime, beamer did
an update...

I will contact Till to see what we can accomplish together.

-Hendri.