% -*- TeX -*- -*- US -*-
 %% Output of bold italic varies with point size
 %% bold italic produces an invisible string with 12pt
 %% an almost unslated non bold text with 11pt

 %\documentclass[10pt,a4paper]{article}
 %\documentclass[11pt,a4paper]{article}
 \documentclass[12pt,a4paper]{article}

 \usepackage{a4}

 \usepackage{aes}

 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \begin{document}
 Normal text {\itshape italic} {\bfseries\itshape bold italic} end
 \end{document}