Here it is, Carolina's Black Swan program from Skate Canada 2008:
http://www.youtube.com/watch?v=tP0rj4lNfP4
She performed this program only two times, first time being at Karl Schäfer Memorial in Vienna.
I think there are several reasons why she dropped this program, but I think Ele is right that there was definitely some outside pressure for her to go back to her old program. There were rumors that the judges did not like it. And it was obvious in her PCS as well, she received 53 in PCS at Skate Canada which really isn't much for someone who had just won the silver medal at Worlds a couple of months before.
To be honest and I don't like the program that much. While it might have improved with some adjustments and changes, I don't find Carolina to be a skater who can portray characters that well. She is much better with a neutral piece of music around which she can construct a program and in which she can accentuate her speed, flow and musicality. She rarely had a program in which she was portraying a character or telling a story (Memories of a Geisha is the only one I can think of at the moment - I did like that program though), also in her exhibition skates.
I think it's because Carolina doesn't feel entirely comfortable portraying someone else. She said herself in an interview that when she was working with Stephane on her "Carmen" program for Opera on Ice, it was rather hard for her to really get into the character and perform it to its fullest. I think she still did a great job, I just find her to do much better when she can be herself and just let the skating speak for itself.