Problem s "tabular"

[Martin )lachta]

Dobry den

Mam problem s pouzitim LaTeXoveho prostredi tabular. Zkuste si tento text:

\documentclass[12pt,a4paper,draft]{article}
\usepackage{czech}
\begin{document}
\begin{tabular}{|c|c|c|}
\hline
 \vbox to3cm{\hsize=5cm\vfill text\vfill}& x & x\\ \hline
\end{tabular}
\end{document}

Pravdepodobne dojde k zacykleni (mozna). Tahle verze vsak fungaje jak ma:

\documentclass[12pt,a4paper,draft]{article}
\usepackage{czech}
\begin{document}
\begin{tabular}{|c|c|c|}
\hline
 \vbox to3cm{\hsize=5cm\vfill text}& x & x\\ \hline
\end{tabular}
\end{document}

Muzete mi nekdo poradit a vysvetlit, cim to ?
Dekuji

              *************************************
                     Ing. Martin Slachta
                      VSB-TU Ostrava
                     http://www.vsb.cz\~sla69\
               E-mail: Martin.Slachta at vsb.cz
              *************************************