[J.T.]

Thanks. So it seems like for this purpose it's pretty much limited to query string, effectively. Can't look in cookies or sessions with this so the e-commerce system needs to add a url parameter if it doesn't want LSWS to use a cached page to a specific visitor.

That's a start but doesn't give many options. I can make it work for a very small subset of pages.

Ideally, like Zend Server, we can add session parameters as part of the condition, see condition two in this example:

http://files.zend.com/help/Zend-Serv...ge_caching.htm

That way, we can show a dynamic page to logged in users, to those who have added stuff to their cart etc. And show a static page to those who haven't done anything yet that personalises the page. I put that on my X-Mas wish list... For 2010 Please!