After encountering bad problems with Sans ExtraLight everywhere, I found
that the problem is because fontconfig expects the Euro sign to be in
fonts, or they will be weighted down quite a lot.
Then I checked and found that the only font in the set that doesn't
support MES-1 is Sans ExtraLight. The following are missing:
U+20ac U+2122 U+215b-U+215e U+266a
I think it would be good to add these before the freeze. Anybody?