My son is 3 1/2 and has no changes in his regular routine lately, but has been doing the same thing for about two weeks now.... But he throws a full blown tantrum at bedtime, and it does not matter if he has a nap or not, it is the same thing nightly. He also waked up between 6:30 and 7:30 no matter what time he goes to bed.
So, Last night I tried the Nanny Jo advice of not talking, not looking him in the eye and just kept putting him back in bed each time he got out. So it took about 20 minutes or so and about 75+ times of literally putting him back in his bed, as since his bed sits in the middle of his room, I would put him in on one side and he just rolled out the other side...
BUT after doing this for a bit, he started getting the hint that it was bedtime and he asked through his sobbs for his bedtime storey and to be tucked in. So at this point I talked to him and told him OK, but if he started crying again, that the storey was stopping. He was then asleep within 10 minutes after the storey.
So, I wish you luck & remember to be calm and patient with them, yelling only hurts and leads to a longer routine....