View source C9 :
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
Nice... but :
111 Errors »
Why won't C9 validate? ...if I can do it, why can't you? I'm just very curious. Is it Microsoft policy or do the developers of C9 just don't care?