criticism of http 1.1 caching

Hi there,

I have written a paper which extensively criticizes HTTP 1.1's cache
consistency
features.  The paper recommends numerous small but important changes to the
specification.  I presented the paper at the Web Caching workshop this week
in Warsaw, Poland (http://w3cache.icm.edu.pl/workshop/).

The paper is on the Web at

http://libra.ms.mff.cuni.cz/internet/caching/consistency.html

I would be extremely interested in feedback or comments.
Especially note the list of suggested HTTP 1.1 changes at

http://libra.ms.mff.cuni.cz/internet/caching/consistency.html#summary of
changes

-Adam