Not technically a Mac issue, but I know someone will know the answer. I've never had this problem until a few weeks ago. When I have the zoom at 100%, everything scales fine. When I zoom closer though, the text inside boxes gets thrown off. I must have hit some type of setting totally unaware. Safari scales fine. Take a look at the two screenshots to see what I'm talking about (look at the "log in" box). Knew someone here would know what to do, haha.