As for case:
[Opera]
match for id or name is case-insensitive regardless of mime type.
[Firefox and Safari]
application/xhtml+xml
match for id is case-sensitive
text/html
match for name is case-insensitive
[IE6]
match for name or id is case-insenstive.
So, it seems it might have to be case-sensitive for xhtml5 (since
other things are case-sensitive in xml) and case-insensitive for
html5. (Unless there's no need to be case-sensitive for XHTML5. If so,
then Opera's way would be cool.)
I don't see any need for it to be case-sensitive for XHTML5. :-)
[1]
http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2007-April/010975.html
Since ID is case sensitive everywhere else, I don't see a reason to make
an exception from that rule here. That seems to unnecessarily complicate
implementation as well as introduce weird inconsistencies for authors.
/ Jonas
