Forum Moderators: martinibuster
It happened to me: I have a service that make URLs small (written using Python), and the form processing page has AdSense. This page had a check to see if the referral URL was from my form. If it wasn't, an error message was displayed (full of Python debug info, I had just put the site live, and was checking it out).
When I fixed this, and people could access the form processing page and no more Python errors, I was being served with Python related advertisement, and it continued for some days. AdSense thought that the page was about Python and kept thinking for some time :p