[pstricks] \psframe* inside beamer crashes

[Goebel, Juergen, OPES26]

Hi,

using \psframe*[linecolor=somecolor] inside beamer-class
leads to the error message 

! Argument of \pst@@@dimtonum has an extra }.

Do I have an outdated style or something like this?

Regards,

Juergen
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