Possible error in Figure 3.1

[Jonathan Katz]

I'm not sure if this is a mistake or not, but anyway I found it slightly confusing. In the picture of the 1-bit register in Figure 3.1, 'in' should be selected when 'load' is set. But in Figure 1.8 of a Mux, the *bottom-most* input is selected when 'sel' is set.