I discussed this with a user, and he says this is more likely due to the new libxft2 (2.1.10) ignoring the autohint setting by fontconfig.
If that's the case, using the ftstring tool in freetype2-demos should show same results on two systems, as (I assume) ftstring talks with libfreetype6 directly without going through libxft2.
I don't have an edgy system though so I can't test.
I discussed this with a user, and he says this is more likely due to the new libxft2 (2.1.10) ignoring the autohint setting by fontconfig.
If that's the case, using the ftstring tool in freetype2-demos should show same results on two systems, as (I assume) ftstring talks with libfreetype6 directly without going through libxft2.
I don't have an edgy system though so I can't test.