Memoir : Warnings “The material used in the headers is too large” w/ accented titles

Question

With memoir class, the default headers height seems unsuitable for accented titles of chapter/section. The result doesn't look strange, but Warnings The material used in the headers is too large (14.1595pt) for the given head height (13.6pt) with additionnal Overfull \vbox (0.5595pt too high) has occurred while \output is active []" are generated for every page concerned.

I've added

\setlength{\headheight}{14.2pt}

in my preambule, but I don't know if it could pose others problems of margin ?

MWE :

\documentclass[a4paper,11pt,twoside]{memoir}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[french]{babel}
\usepackage{lipsum}
\begin{document}
\chapter{Titre accentué}
\lipsum
\end{document}

Answer 1

In memoir changing the \headheight will not affect the position of the baseline of the header text. Increasing the \headheight allows more vertical space for the text. Changing \headheight will only alter the spacing between the top of the page and the baseline of the header.