Hi Emma
You know if she is starting to need less sleep and she works best on a long am nap, then you don't have to cut that nap. You can leave that nap as long as she will take and simply cut the pm nap back to a catnap, just enough to see her through till bedtime.
Cutting the am nap short for a long pm nap does work very well for a lot of LO's but for some Tracy's method of leaving the am nap long and slowly pushing it later by 15mins every 3+ days until it is at about 11am when it then become the only nap really works best. To prevent OT creeping in you offer a catnap, in the late pm and when this no longer works you do a very early night.
I know your concern is that the am nap is making her wake early in the am, however if you reduce her day sleep in the pm or am she should eventually start making it back up at night. Plus if you start to push the am nap forward bringing it further from the night there is less chance she will use it as an extension of the night. Generally it doesn't matter where they are getting too much sleep during the day, either way they will reduce the night sleep to balance it out and end up waking early.
Have you read "sleep gone wonky 10-11months" thread in nap FAQ board? If not give this a read, it's applies to all LO's gearing up to transition at any age, not just 10-11m olds.
So what I'm saying here is you need to figure out what pattern of naps works best for Abby and follow that route, not just following the advice mainly offered. I did this and DD transition was horrible, if you get it right there is no reason it can't be a fairly smooth ride.
Vicku - your advice is fantastic and I don't want you to think I'm tredding on your toes

it's just having gone through this transition badly I don't like to think of others going wrong the way I did iykwim
