So I just moved over my account to a new machine, and everything works fine with the exception of mail and address book. For some reason, the spacing between lines in certain places is all wacky (like unaligned double-spacing), as shown here. It's even cutting off the tops of things and making double-sized bubbles like on Reply-to.
I've never seen this in my years of Mac-ing and am not sure where to even look. Only these two apps seem affected. Address book is particularly annoying, because things that used to fit on one normal screen now have to scroll a ton. Any thoughts?