Not really an error, but I thought I should let other folks know: the "average" crew sizes listed in the table on page 23 DO NOT work terrably well for very small ships.
They work just fine down to Size 3, but below that things can get weird. For instance, the largest size of shuttle (which will be the size of a small rent-a-truck) will have a recommended crew of 9. And If one were silly enough to designate it as a medical, rather than transport, ship, it would now have about 3 crew per cubic meter, which I think cannot be achieved without a food processor.
I encountered this while trying to build a Size 2 Science ship: I was aiming for a crew around 12, and found a "surveyor" about 50m long will have a crew of about 180, by the table. Reducing it to 6m long puts it closer to 90 crew.
Needless to say, I'm going to be fudging some numbers.
------------------
You're a Starfleet Officer. "Weird" is part of the job.