Racism in LOTR?

I read a while ago in a newspaper that The Lord Of The Rings featured questionable rascist connotations. Can anyone tell me what these are? I considered that it might be the hatred of the Orcs but then again, Orcs were innately evil, so I don't buy that argument at all.
Before I heard this remark, I liked to think that the friendship between Legolas and Gimli was Tolkien's comment on rascism.