incorrect marker position with \pgfuseplotmark using XeLaTeX.
MWE:
\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{plotmarks}
\begin{document}
\begin{tikzpicture}
\node[mark size=3pt,color=green] at (0,0) {\pgfuseplotmark{*}};
\node[mark size=3pt,color=red] at (2.9,-5.3) {\pgfuseplotmark{*}};
\draw[->] (0,0) -- (5,0) node[right] {$x$};
\draw[->] (0,0) -- (0,3) node[above] {$y$};
\end{tikzpicture}
\end{document}
The attached image shows the produced PDF with PDFLaTeX and XeLaTeX