I sure hope that whatever it is that it's not serious and I agree that maybe she could have an ear infection. The vet should've picked up on this though so it may be something else. Please keep us updated.

My Sunny is now 5 years old and I've also noticed that he sometimes has problems jumping up onto my dining room storage cabinet. He only has problems jumping up here but it doesn't always happen. I try not to worry too much about it.