First Kanye dropped Jay's name out of Cold, in the part where he says, "Might have Jay drop you from the team," in reference to his wife Kim K's second ex-husband Kris Humphries who plays for the Brooklyn Nets, once part-owned by Jay Z. Then he dropped Jay's name from Blood on the Leaves where he says "I don't give a damn if you talk to Jay."
This move has been widely interpreted as a slight by fans. Watch it after the break. -link
