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"""Q""" Very often when we try to upload a file (several types such as jpeg, ppt etc.) we get an error message from Internet-Explorer "page cannot be displayed"

Not always but very often (absolutely not reliable). We don't see any error messages, neither in apache nor in tomcat (as if there had been no request at all).

Apache is configured to redirect all non-SSL request to SSL, but I think that shouldn't cause any problems because that happens only once (the user must first log-in, then go through several dialogs before he can upload, thus the redirection is done much earlier).

Except that, everything is very stable.

Any ideas?

"""A""" The reason was Internet Explorer needs the following in Apache:

SetEnvIf User-Agent ".*MSIE.*" \
nokeepalive ssl-unclean-shutdown \
downgrade-1.0 force-response-1.0

Zsolt