An important note from Cinematical, if you're out shopping for Alexander on DVD:

Two versions of Oliver Stone's epic flop hit stores today: the theatrical version has commentary from Stone and historian Robin Lane Fox, a behind-the-scenes doc called--wait for it--"Perfect is the Enemy of Good" (pause for snicker), and a featurette called "Vangellis Scores Alexander" (Vangellis!); the Director's Cut has all that, minus Fox's commentary and eight minutes.

... I wonder what Stone has against Classicists ...

UPDATE: See now this piece in the Miami Herald for what some of the changes are.