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This isn't exactly a bug, and you'll only notice it if you use Chrome, and only if you have it set to upgrade automatically and have the most recent version, and you might not have noticed anyway, and I'm posting this preemptively before anyone has mentioned it, but...
...Chrome has been messing with the way their fonts are rendered lately. This is probably good news in a long-term sense because a lot of developers had issues with it. But it's been bad news in the short-term because it's mucking with the margins and sizes I'm using for the site's primary font. I changed the alignment of some of the headers and buttons to account for this, only for Chrome to mess with it again shortly after. Ugh.
That's a minor inconvenience, though: the real problem is that at some of the sizes we're using, the text can look suddenly too thick, and kind of squished or jagged at certain sizes. So just a heads-up that I'm aware of this, and it's lame, and I'm going to try to find a fix for it, assuming another version of Chrome doesn't come along and undo the fix for the fix, or whatever.