Previously the mobile view worked fairly well (not the app, the actual mobile site).
At some point in the past few days it appears that the top menu (the inbox header and the Questions/Tags/Users bar) got shrunk significantly. Usernames/posts/comments also are rendering... weirdly.
I'm assuming that given how weird the display looks that it is a bug. You can sort of see the behavior if you go to the mobile full site, but the size differences are much more apparent on a phone vs computer browser.
I am using a Moto G.