yes, can cause vitamin deficiencies that deprive your brain, bones, and other organs of vital nourishment, but you can effectively manage through your diet.
check:
http://digestive.niddk.nih.gov/ddiseases/pubs/celiac/
http://www.celiac.org/...
It's spelt Linux.
Windows for business and games.
Apple for movie producing and image editing.
Linux for performance and reliability.
EDIT: At the moment, I use Windows Vista Home Premium (prefer Ultimate) and going to upgrade to Windows 7 Ultimate on October 22nd. And yes, I'm a hardcore...