So, I'm not lucky. Its the way its (AbstractList ) supposed to work. And yea the indices change, but only of those I already checked.
Okay, you caught me wrong here

Serves me right for trusting my memory rather thenr efferring to the docs.
Not all collection types however have the same behavior in this regard, of that im sure, so the One Safe Way for all collections is stil lto use an iterator

JK