I'm having the same problem now, only it's naps only. I can't seem to get her down for any more than 40 mins (and she usually fights a little bit before actually going down), and she usually takes good long naps. I can't seem to identify a problem either...other than quite possibly seperation anxiety (and her speech skills have picked up a little...she's starting to say Dadadada...). It's driving me nuts. She's not crawling (doesn't seem close), and doesn't want to roll over (that's never been something she's done on a regular basis anyway), but she does tend to calm down when I enter the room. Keeping her up doesn't work either, neither does putting her down a little earlier.
I'm thinking this is just something else I'll have to weather through. She does take naps, even if they are only 40 mins, but she's cranky all day, which makes a cranky mommy. I figure though, if she's tired enough, she'll take a long nap. I really can't force her to take a longer one if she refuses to at this point. Leaving her alone to fuss a little bit and hope she just goes back to sleep (not cry out), exending naps, etc. doesn't seem to be working either, and I usually keep her up close to 3 hours, I know that's where she's tired enough to sleep long.
Anyway, all this to say, just some thoughts on how I'm handling a similar problem. Hope something in here helps!!
*HUGS*
Sonya =P
