I don't want to start a fight or anything, but I too fell in love with the picasso percula. After searching high and low (including TCM's site) and turning up nothing, I went back and had another look at the photos.
First off, let me tell you that I used to teach Adobe Photoshop professionally. I led the trade show demonstrations for release 5.0 in the Adobe booth at trade shows around the country, taught for the Internet Institute, as well as subbing for the Art Institute of Dallas. Needless to say, I know my photo-editing.
In using some techniques that I taught to law enforcement agencies to spot "doctored" photos, I find ample evidence of this in both the snowflake image, and the square snowflake. I'm not saying they definitively do not exist, but I definitely question the validity of those photos. You don't need a fancy degree to see it either, look at the white stripe under the eye of the squareflake, there are two of them, different shades and all. One was layed on top of the original stripe.
Pretty good photo editing, but edited in my opinion. Just didn't want other people out on a wild goose chase like I feel that I was...
Jason