Most nights, the problem's been not going to sleep. The first couple of nights were great, but then she started waking up in the middle of the night--3,4,5 AM--sounding like it's 9:00, and asking for her morning milk fix.
But the ongoing problem quickly became going to bed. Whether it's the slight change of routine--story in her bed instead of in the rocker--or the giddy liberation of no bars, she would just. not. go to. sleep. She'd just play and chatter and call out and drive us inexorably crazy. 8-8:30 would stretch to 10-11:30, easy, cutting right into prime time; the hours after the kid goes to sleep are the most productive and old-school normal around the house.
Then last night, after going and staying in bed like a good kid, she woke up between 3 and 5, crying for Mommy every thirty minutes or so. I was useless; my presence just made her cry louder, which pissed everyone off that much more. It wasn't until we'd given up, around 5:30, that my wife finally coaxed an explanation from the sobbing, writhing, semi-conscious creature who kept asking if it was morning yet, she wanted it to be morning: she didn't want to sleep again because her legs hurt.
Turns out growing pains can cause you agonizing suffering at night even if you didn't live through the 1980's.