Case in point: https://android.stackexchange.com/questions/13858/whats-new-in-2-3-6-on-the-nexus-one
There are others, however.
(This particular question is way too specific, asking about a bug release version on a particular device, but it should illustrate the point.)
Anyway, what do we want to do with questions like this? There is no official "changelog" we can refer people to, except where there is a major revision. Even so, a change to just the third node in the version number is almost certainly nothing but bug fixes.
Frankly, I think questions like this should be closed as "too localized", but I'm afraid we're going to keep getting them.
Would it be worth it to have canonical questions for each of the major versions? We could add point-releases like this to the major version if we can suss out what was changed.