Chinese?

[Visarts]

Just recently added adsense to my forum, and everything
seemed relevent up till about a week ago.
Now I'm getting ads for Google searches in chinese,
and completely unrelated links to button manufacturers
(my site is only related to tech and arts)

here's an example:



and that's actually a tame example.
Mostly the chinese ads have been linking to Asian biology sites,
which is completely off topic

I heard a rumor that google was making changes to their
adsense software, but would they really be doing that live?
and would it actually produce oddball results like that?

::edit::
here's another one:

[whipnet]

I can see you getting results like this (Not the chinese) if you put ads on the main page of the forum.

Do you get results like this on your specific topic pages?