This can often happen when you take off length. Sometimes the hair has a "freak-out" period after a cut and then will return to normal later. Also, sometimes you will lose curl for a while with shorter hair. I find that getting a really good, slightly layered cut from a stylist who understands curly hair is key. That ended up being the key to my short hair looking its best.

Also, what are your properties? What techniques/products are you currently using?
Mod CG since 8/2010
2cFii (fia), normal/normal, protein junkie. Itchy and allergic wavy!
Growing out
http://public.fotki.com/Mountaincurl/
pw: mountaincurl