How close are they to the zope server. If they are connecting through an ISP or something, it is possible that the ISP has a cache between them Zope, transparently intercepting traffic. See if the Server line is changed in a response, or see if there is a Via header added (use a utility that will show you http headers, like ab or curl). If there is a transparent cache, you can ask your ISP to exempt you (assuming it is your ISP and not some cache in the middle of the internet somewhere), or else you can try to work around it.

The browser reload process should be sending no-cache requests or if-modified-since ones, so your only recourse is to make the objects themselves uncacheable, including the management pages, otherwise the cache might cache the management pages, even if the results of the rendered page are not cachable. I would look around in the ZServer and see where it constructs the http response, and force it to send 'Cache-Control: no-cache, max-age=0, private' and 'pragma: no-cache' on every single page it sends. One of those should work on every cache I have ever seen, from many years ago to the present. Don't worry about pages that send these headers as well. It is legal to send the same header twice. You will still have to wait a while for the cached versions to timeout o any network cache, before this solution will work.

--sam

kosh wrote:

Not sure if this is a zope issue or not. I have some people doing work on
a site developed in zope however ie is often showing the wrong version of
the page. I followed the caching instructions in
http://www.zope.org/Members/htrd/howto/caching and it works on every
browser except ie. I have checked and they have set the browser to check
on every page view however often it does not even hit the webserver. I
have had them hit reload while watching server logs and no connect was
attempted. I then tried it in vmware using nt 4 with ie 5.5 and it does
the same thing also. Even when the cache is deleted on ie and it is told
to run with no cache it seems to cache the documents somehow. It seems the
only solution is rebooting windows on their machine which is not a good
one or using some version of netscape.
If someone knows why this is happening I would really like to get it
solved. If I could get away with having no ie support I would but alas
that is not an option I have. :(
_______________________________________________
Zope maillist - Zope@zope.org
http://lists.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists -
http://lists.zope.org/mailman/listinfo/zope-announce
http://lists.zope.org/mailman/listinfo/zope-dev )

-- 
------------------------------------------
"There are two rules for success:
    1. Never tell everything you know.
                        --Roger H. Lincoln