When going back to a page that has been posted to, instead of reposting or retrieving a cached copy it treats the document as a get. This is fine for static HTML but for session based applications we have an issue! :)
reassigning to browser product where it belongs.
Is the problem hear that we are do an if modified since rather than just displaying what is in the cache (ala bug 21137)?
This is probably a dupe of 20843
*** This bug has been marked as a duplicate of 20843 ***