Anyone else experiencing this? I can't link to the issue yet because the site is still un-launched, but the issue is that on the iPhone there's a mysterious margin on the right, but (to make it weirder) only on posts -- not on pages, which render correctly. I've removed all my custom CSS and it still does it, so it's something right in the base/child themes somewhere.
It's as if one of the main, primary, or content divs, or the article element itself has right margin it shouldn't, that's only called on posts, never pages.
More weirdly still, the theme author's own site does *not* behave this way on my iPhone, where posts render correctly, with no margin on the right.