Have you tried including some cache control directives in your web pages?
<META HTTP-EQUIV="cache-Control" CONTENT="no-cache"> <META HTTP-EQUIV="Pragma" CONTENT="no-cache">
Full spec of cache control directives can be found here:
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9
I don't know but i wonder if specifying a public anonymous proxy in your browser would bypass your ISP's proxy? Maybe the same issues exist even if you're directing requests to an external proxy of your choice?
-- Rodolfo J. Paiz rpaiz simpaticus com http://www.simpaticus.com