Interesting thing ...KC seems to be changing her signature, morphing it to a little more like Jose's signature, quite flamboyant amd flourished, signing only certain letters. It can be seen here, on her waiver to appear in court Fri., pg. 2. Jose's sig. is on the same page:
http://www.wftv.com/news/18577477/detail.html
Kind of reminds me of the press conference where she started dressing like a law clerk, with pin-striped pants, white collared shirt, and studious glasses.
Anyway, thought I'd bring it over here, to see what opinions there were from the psych. pt. of view. She seems to be signing CAY, now. A kind of shortened "Casey", but more interesting is that it seems like more of Caylee's name.