Companies update their logos on occasion -- sometimes drastically, sometimes subtly. Facebook has quietly updated its own, and it has gone with the latter of the two extremes. The changes are subtle, and if you aren't the type to pay much attention to such things you might not have even noticed. Those who are familiar with the old Facebook logo will notice a couple slight differences, though, with the letter “a” being the biggest difference: it has been changed to reflect how most people write it rather than the traditional typist style. Other letters like the “k” hardly changed at all.