I am still learning to use tikz from the manual. I got an error for this code:
\documentclass[twocolumn,english]{article}
\usepackage{tikz}
\begin{document}
\begin{figure}
\centering
\begin{tikzpicture}
\node[fill=yellow,text width=3cm,align=center]{This is a
demonstration text for showing how line breaking works.};
\end{tikzpicture}
\caption{Dim}
\label{fig:dim}
\end{figure}
\end{document}
Here is the error in pgfkeys (is this package related to pgf/tikz?):
! Package pgfkeys Error: I do not know the key '/tikz/align' and I am going to
ignore it. Perhaps you misspelled it.
What am I doing wrong?

text aligninstead (as I think it used to be called that). – Andrew Stacey Dec 08 '10 at 11:13text aligndoes not work either. How do I install more recent versions of these packages in Ubuntu? – donatello Dec 08 '10 at 11:53pgfrcs.code.tex, and the version documented in the manual is on the front page. If these don't match, perhaps you have a problem in your TeX inputs path. – Matthew Leingang Dec 08 '10 at 13:55