Too-large chars with Acroread from XeLaTeX with OTF

[spacedman]

With a simple Latex file processed with XeLaTeX:

 \documentclass{article}
 \usepackage{fontspec}
 \setmainfont{OpenDyslexic-Regular}
 \begin{document}
 \section{This is a test}
 {\Huge Look at my font!} 
 Lorem ipsum...
 \end{document}

I get perfect results when viewing with a Linux PDF viewer (evince) but Acroread shows this:

but only if I am using the OpenType (.otf) fonts. If I switch to the TrueType versions, it looks perfect in evince and Acroread.

I've not seen this problem using some of the other OTF and TTF typefaces on my system, only OpenDyslexic's OTF version.

This occurred with the OTF font files distributed with the Ubuntu packages, but I've uninstalled those and got the same behaviour using the current github versions of the font files.

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[antijingoist]

Can you send me a copy of the 2 PDF s ? (The TTF working & the non working one)

[spacedman]

Files now in my stash:

https://github.com/spacedman/stash

thanks