I'd hazard a guess that he's not dropped sleep needs but just isn't getting what he needs despite best efforts. I know it isn't any consolation but there's nothing you can do really.
This is exactly what I'm thinking.

Argh!
The last few days have gone like this...
Mon:
6ish: Up
11:30: in crib
11:40: sleep
12:40: up, yelling 'ready, set. go' and throwing himself at the side of the crib, shouting 'big day austin!' repeatedly (it was his birthday

)
6:45: in bed screaming and crying - really OT and sad, we had to keep going back and staying with him
1 or so short NW when he settled himself
Tues:
6:10: up
11:50: in crib, carrying on until
12: sleep
1:30: up
7: in bed, I was in and out of there about 8 times
8: sleep
Today:
6:05: up
11:30: in crib yelling, singing, babbling, DH was in and out when he was screaming
1: I got home, DH went in to lay down in there on the small carpet and A stands up saying "Daddy sleep Taupo bed' Taupo is the dog! Haha.
1:15: I said forget it and we got him up, DH says he didn't sleep a wink.
So...

I have to go back to work but I'll tell DH to plop him down at 6. We'll see. Hope, hope, hope for us that he tacks.
