[phpMan2010]

I have a fairly complex web application and I've used browser caching to really speed up delivery.

Unfortunately, the QA team often forgets to clear their browser caches, and the average user never clears theirs.

How can I retain the advantages of browser caching, but still have the browser refresh the files when necessary?

There's actually two sets of files - some are library files which will NEVER change (dojo), and some are local, which change infrequently.

The system is fairly stable.