Broken Base: One of the most infamous. The Chris/Kelli war continues to this day, even though the band split up years ago.
There's also deliberation over the SP 5 songs- the fans are divided over whether the songs are good or bad, or whether they're actually Sneaker Pimps songs or not. It doesn't help that the female singer is only identified as 'Tori'.
Fan Nickname: "SP4" for the unnamed and unreleased fourth album.
It's the Same, Now It Sucks!: Part of the reason why they changed themselves so much- a number of trip-hop bands had sprung up consisting of two guys and a female singer, and they didn't want to be just another trip-hop band.
Nightmare Fuel: The song "6 Undergroud" is very creepy and haunting, and while the lyrics are kind of vague, the title pretty obviously refers to death i.e being buried 6 feet underground.