yup, this started with us a couple weeks ago. lo (9.5mo) did get a lot of teeth at that time, but i think it was more the separation anxiety. on most nights i had to stay with him until he fell asleep, and then again when he woke up in the night. sometimes he would want to feed, too, so his daytime eating got all mixed up.
it has gradually been getting better. now we are at the point where he goes down by himself most of the time again and only needs me once in a while to fall asleep. some nights he sleeps through, but most nights he wakes at least once.
so many people told be it's something that you have to ride out.