Today I learned about a controversy which had erupted at "the other" university in Leeds: Leeds University. A speaker from Germany had been invited to give a talk, but then he got uninvited again, for fear of protests regarding his controversial presentation which was titled "Hitler's Legacy: Islamic Anti-Semitism in the Middle East". The Yorkshire Post described the story, and many bloggers have picked it up, e.g. Beer and Sandwich, Engage.
Leeds University posted an official reply to the accusation of censorship.
More on this can be found by searching Google or Google News.
I wonder how such a dispute would have been dealt with at our university... I would hope that it would have been done in a more open way, protecting free speech.