I think the difficulty may have been the sheer physical demands made by the role. He did walk out on the first day. I saw one of the "making of" bits, and I seem to remember something of that sort mentioned around the fighting/stunt section. (My teenage oracle/LOTR freak knows all about it, but she's away until tonight). I think he had some sort of idea that there wouldn't be so much fighting involved.

His loss, our gain.

Andrea