Actually, that's true, but if you want the application to work with clients you don't necessarily have control over, you'll have to force the browser to not use cache.
There's a great article on how to do this in LDD Today.
It's a few months old, here's the URL:
http://www-10.lotus.com/ldd/today.nsf/62f62847467a8f78052568a80055b380/2aa6ecf8f295019085256b9c006fd147?OpenDocument
or just go to LDD Today and search on http, header, cache...
Good luck!
Luke Coverdale