Re: Why is my 3 1/2 year old peeing all over the house?! Help!
Sounds to me like there's just a lot of change going on and she's reacting to that. I think the best way to deal with it is to either just keep cleaning, or to give her the option of going back into diapers.
If you don't already, you could also try having her clean up the messes (even if you have to reclean). I have heard some parents that said that was harsh, but I fail to see what's harsh in it.