I got this on my 330 (2010).....It's not a problem and I haven't really paid it too much attention and I'm fairly fussy on things like that..

Yes I know what you mean, lem-oil would actually penetrate and soak into the pause of untreated fingerboards, I dislike playing with a dry untreated fingerboard.
However even though lem-oil will not solve the problem in this case it is still very good to use on treated fingerboards if use sparingly. It may in the long term help prevent any cracking or crazing of the treated fingerboard finish

ant7629, as far as I know the frets are in position when the fingerboard has it's finish applied,
So therefore the frets would probably get covered in a small amout of finish at the same time.
I suspect you may indeed have a small area of imperfection directly next to the frets as you described, it is certainly nothing to be concerned about. It is basically where the lacquer has settled.

It's a very beautiful fingerboard too, wipe it with some lem-oil and I love to get my hands on it!