I've been getting a lot of spam routed into my inbox instead of directly to spam for a couple months now. Before then, I never ever had spam not route directly to the spam folder.
It's been very strange. Things have actually gotten a little bit better lately, but for several weeks I was receiving several spam messages a day, all routed to my inbox. They all appear to be a similar format too, they all have a little area at the bottom with a fake company address, fake unsubscribe, and the subject is always sent using unicode text instead of ascii.