Ok, I think I'm 100% sure on this, but you're not allowed to have adsense on pages with affiliate links to Poker places like Fulltilt, Golden Palace, etc??? I have a really good friend who just put up a Fulltilt ad on his webpage, and I want to warn him of this before he gets banned-- but if it's allowed, I don't even want to bug him with it. I'd hate to see him get kicked out for not looking this over. I'm warning him now anyway.
My guess would be that its against the TOS. In the TOS it says that the site may not contain gambling related content. In my oppinion ads are content.
Ads do not count as content. Content is everything in the page not including ads, which are, well, ads. If ads qualified as content, then everyone who uses CPM banners would be in violation, as every CPM network has at least one gambling-related ads at one time or another.