}-warning when using \fromSlide inside tabular environment

Hi all,

I get the warning

! Missing } inserted.
<inserted text>
               }
l.647 \end{slide}}

when I used \fromSlide inside a tabular.
The number 647 refers to the last line of the following slide:

\overlays{4}{
\begin{slide}[Replace]{Direct reordering algorithm for PRSF}

   \fromSlide{1}{Then}
   \vspace{3.0mm}

   \begin{tabular}{l}
   \fromSlide{1}{
   $ P_l {\bf X}_0^{-1} (T_{K-1} T_{K-2} \ldots T_{1} T_{0}) {\bf X}_{0} 
P_r = $
   }
   \\ \\
   \fromSlide{2}{
   $ = \underbrace{P_l {\bf X}_0^{-1}}_{{\textstyle S_0^{-1}}}  T_{K-1}
        \underbrace{{\bf X}_{K-1} P_r}_{{\textstyle S_{K-1}}}
        \underbrace{P_l {\bf X}_{K-1}^{-1}}_{{\textstyle S_{K-1}^{-1}}}
        T_{K-2} \underbrace{{\bf X}_{K-2} P_r}_{{\textstyle S_{K-2}}}
        \ldots $
   \\ \\
   $   \ldots \underbrace{P_l {\bf X}_{2}^{-1}}_{{\textstyle 
S_{2}^{-1}}} T_{1}
        \underbrace{{\bf X}_{1} P_r}_{{\textstyle S_{1}}}
        \underbrace{P_l{\bf X}_{1}^{-1}}_{{\textstyle S_{1}^{-1}}}
        T_{0} \underbrace{{\bf X}_{0} P_r}_{{\textstyle S_{0}}} = $
   }
   \\ \\
   \fromSlide{3}{
    $ = S_{0}^{-1}   T_{K-1} S_{K-1}
       S_{K-1}^{-1} T_{K-2} S_{K-2} \ldots
       S_{2}^{-1}   T_{1}   S_{1}
       S_{1}^{-1}   T_{0}   S_{0} = $
   }
   \\ \\
   \fromSlide{4}{
   $ = \left[\begin{array}{cc}
         T_{22}^{(K-1)} & 0                      \\
         0                      & T_{11}^{(K-1)} \\
         \end{array} \right] \ldots
         \left[\begin{array}{cc}
         T_{22}^{(1)} & 0                    \\
         0                    & T_{11}^{(1)} \\
         \end{array} \right]
         \left[\begin{array}{cc}
         T_{22}^{(0)} & 0                    \\
         0                    & T_{11}^{(0)} \\
         \end{array} \right], $
   }
   \end{tabular}

\end{slide}}

The output, however, is correct. But the warning irritates me!

Regards,
Robert

-- 
Robert Granat
Department of Computing Science
Umeå University
SE-90187 Sweden
Phone: +46(0)907866129
Cellular phone: +46(0)733429554
Email: [email protected]
WWW: http://www.cs.umu.se/~granat/index.html
-- 

-- 
Robert Granat
Department of Computing Science
Umeå University
SE-90187 Sweden
Phone: +46(0)907866129
Cellular phone: +46(0)733429554
Email: [email protected]
WWW: http://www.cs.umu.se/~granat/index.html
--



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