You call it: Miserable or miscast?

George Clooney in Michael Clayton: an overhyped actor who seems to be undergoing a messy divorce from nuance on-screen OR a sparkling comedic actor in the wrong role? Discuss.

(Not up for discussion in any way -- Tilda Swinton or Tom Wilkinson, who wipe the floor with any weak-sauce thespian thrown mercilessly into a scene with them.)