The following info was provided by contactmusic.com.

(TOBEY MAGUIRE, KIRSTEN DUNST and JAMES FRANCO are being called back to the set of SPIDER-MAN 3 for reshoots, after test audiences complained the movie was lacking in "action". Franco, who plays Spider-man's alter-ego PETER PARKER's troubled friend HARRY OSBORN in the superhero movies, has just finished filming comedy drama CAMILLE with SIENNA MILLER. He tells MTV, "The next thing I'm shooting? Re-shoots on Spider-Man... Probably next month (SEP06). "(Director SAM RAIMI) wants more action."
23/08/2006 17:11)

I just wanted to let you all know in case you thought there wasn't any hope left. I'm going to write to cast members via the previously used address:

'Spider-Man 3'
Columbia Pictures, 10202
W. Washington Blvd.,
Robert Young Building, Ste 3000
Culver City, CA, 90232
USA