We have some problems with BM caching some pages and when a user press F5
(even CTRL-F5) to refresh the content then quit IE and restart on the same
site, he still get the old page. The site has a Pragma "no-cache" but it
seems it's not enough.

We got 2 differents proxy and when I try both, they both act the same, ie
show an old page. Maybe you can try an exemple with the site
www.cyberpresse.ca and see if it does the same with you. Of course if it's
the very 1st request you'll get it up to date but a few minutes later and
you'll get the 1st page stored. We see the time just right to "Toutes les
derniŤres minutes" phrase. The weather won't be the same also.. anyway,
you see the picture.