Aaah caching. My favourite subject
Have a look at the following link. It explains caching pretty well
http://www.mnot.net/cache_docs/
Apparently the Pragma no-cache meta tag isnt the one you should use since it
isnt part of the standard and has inconsistent support.
-Original Message-
You can try some of the many cache-control headers - use HTTP 1.0 compatible
'Expires' header with a negative value(-1440 for example). This usually
works. The neat thing to do is to actually make use of the browser (or even
more effectively, the reverse proxy) cache by intelligent use of cache