Hitchhiker's Guide to the Racist Fanboy
The background- There's a Hitchhiker's Guide to the Galaxy movie being made. From what I can gather, they seem to have an interesting cast. However, some people have issues.

Mostly, it's issues with Mos Def playing Ford Prefect. With little racist gems such as...

bbagnall's 'white guilt' no longer holds him back!
"God almighty!!! Ok, I've just hired the ninja. Screw you Disney! Every time they get a black actor in one of their movies, they just gotta have him as a professor, a brain surgeon, a computer programmer, or whatever. LEAVE DOUGLAS ADAMS' STORY ALONE!"

meishern's powerful argument for a white Ford!
"If earth was about to be destroyed, and a black man had a choice to save one person. Would that person be white????? "

You can note that most of these people haven't actually seen Mos Def in anything, but they're highly offended that he is black and a rapper.
Add in the grammar bitchery and people worrying that Ford will be written as a tech geek and you've got full fandork panic! Somewhere in the boards there's someone commenting on Ford's race, nevermind they haven't read more than ten pages of the first book.

(There's a small pocket of fannish dissent regarding Martin Freeman as Arthur Dent, too, but it's miniscule compared to this. Which means it's itty bitty.)