I’ve spent the last three hours studying and trying to replicate Mac OS X’s Finder selection behavior. Following the instructions in the archived copy of the link inside that post gives me proper mouse-selection behavior (!)… now I just need to figure out WTF is going on when I use shift and the arrow keys. :cry:

The amount of thought put into that most basic behavior (even if it sometimes produces strange results) is pretty staggering, actually—and nobody notices.