[css3-animations] Case sensitivity of @keyframes

http://dev.w3.org/csswg/css3-animations/#keyframes

The grammar for @keyframes includes this line:

keyframes-rule: '@keyframes' IDENT '{' keyframes-blocks '}';

However, at-rule keywords are generally case-insensitive (the only  
exception I can see in 2.1 is @charset). Neither WebKit nor Gecko require  
lowercase for their prefixed versions of @keyframes.

-- 
Øyvind Stenhaug
Core Norway, Opera Software ASA