Using fillin enable in « validate/index.yml », when posting a form with errors, the form is filled automatically but any accentuated characters in the meta-description and meta-keywords defined in config/view.yml are printed before their corresponding tags.
Steps to reproduce :
[index.yml]
fillin:
enabled: true
[view.yml]
default:
http_metas:
content-type: text/html
metas:
title: Website
robots: index, follow
description: "tést"
keywords: "testà"
[HTML Results after fillin]
é<meta name="description" content="[T]tst[/T]" />
à<meta name="keywords" content="[T]test[/T]" />
A solution was to insert ASCII-only values named "meta_description" and "meta_keywords" which refer to my text strings inside my messages files.