Well, I did nothing special yesterday, and wouldn't you know it, when it started, it had no issue. It did take a couple crank sessions to get it started though. I try not to press the accelerator pedal more than once before it starts, so I don't know if there's enough gasoline in there.

I have no idea what this intermittent problem is, but it's sure stumping me, and will never come back when I want it to. It makes it very hard to diagnose.