We are running mantis behind an SSL-Proxy and had various issues with caching. After upgrading to 1.1.5 most of our caching problems went away. However one problem still remains:

IE 6 users who'd like to sort the displayed bugs on the view_all_bug_page.php have to click twice on the column title to get it resorted. After the first click, the page reloads but nothing happens.

This behavior have been observed as well when uploading new attachements or commenting. The new attachements or comments are only displayed after a refresh of the page.

The ssl-proxy is a simple apache proxypass directive with no additional tweaks.

Only $g_allow_file_cache is set to ON, as otherwise IE Users would have Problems with downloading attachements. $g_allow_browser_cache isn't set.

I even tried applying: http://www.mantisbt.org/bugs/plugin.php?page=Source/view&id=13580 as well running it with enabled $g_allow_browser_cache, however both didn't change anything, even in combination.

And I always cleaned the cache before retesting the issue