[imp] Imp via SSL - IE locks after username/passwd submit?

[Vizitiu, Ciprian]

Hi listers.

Imp 3.2.2. Horde 2.2.4. Apache 2.0.40. php 4.2.2. Relevant section of
httpd.conf

NameVirtualHost 0.0.0.178:443
<VirtualHost 0.0.0.178:443>
    ServerAdmin     webmaster at some.org
    ServerName      webmail.some.org
    SSLEngine       on
    SSLProtocol     All
    SSLCipherSuite
ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP:+eNULL
    SSLCertificateFile   .../conf/ssl/crt/webmail.crt         
    SSLCertificateKeyFile .../conf/ssl/key/webmail.key         
    DocumentRoot    /var/www/html
    ErrorLog      logs/webmail-error_log
    CustomLog       logs/webmail-acces_log common
    SetEnvIf                    User-Agent ".*MSIE.*" \
         nokeepalive ssl-unclean-shutdown \
         downgrade-1.0 force-response-1.0

    KeepAlive   Off
</VirtualHost>

All seem to work OK except IE. 6.0.28 (latest patch from M$). After
filling the login form IE freezes attempting to login (it opens forever
the redirect.php page) All other browsers (Mozilla, Opera, Konq) work
without any problem. More: if you press CTRL-N, the new window, in good
IE tradition, has the same URL like the old one and guess what, it puts
you in the INBOX page without any delay! But then clicking on any mail
brings the same issue. Httpd on the server does NOT consume CPU during
this... 

To add insult to injury on the very same site Squirrel webmail runs
perfect with the above virtual host definition; from IE or any other
browser. Unfortunately the rodent chokes when it comes to a 6000
messages INBOX. :-] Oh, I've attempted https://host.org/horde that is no
imp and it works; Since Squirrel works from the very same config and
also horde/ goes Ok, to me it looks to me like IMP but any hints would
be greatly appreciated...