Ah, good find. You are correct goodiiii. According to the .inf file I got from the autoinstall server, the filenames are all i386 filenames.
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/mailmng_domain_rename" target="/usr/local/psa/tmp/qmail-mailmng_domain_rename" md5="7e$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/authpsa" target="/usr/local/psa/tmp/qmail-authpsa" md5="8979b440c7bc36bebd9518f9edf883$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/mailsrv_conf_init" target="/usr/local/psa/tmp/qmail-mailsrv_conf_init" md5="1e35534e3b$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/mailmng_domain_toggle" target="/usr/local/psa/tmp/qmail-mailmng_domain_toggle" md5="ef$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/mailmng" target="/usr/local/psa/tmp/qmail-mailmng" md5="1d3f2b1a7369d951e48d20b067c5ea$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/mailsrv_entities_dump" target="/usr/local/psa/tmp/qmail-mailsrv_entities_dump" md5="9a$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/smtp_auth" target="/var/qmail/bin/smtp_auth" md5="6804e099be4540bcf27348f11c1251b0" cr$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/cmd5checkpw" target="/var/qmail/bin/cmd5checkpw" md5="3d17ee84a3843a1bd6f654f023887c69$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/mailmng_domain_rename" target="/usr/local/psa/tmp/postfix-mailmng_domain_rename" md5$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/authpsa" target="/usr/local/psa/tmp/postfix-authpsa" md5="38520b09a4de8e66ceead3153c$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/mailsrv_conf_init" target="/usr/local/psa/tmp/postfix-mailsrv_conf_init" md5="ecdd7c$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/mailmng_domain_toggle" target="/usr/local/psa/tmp/postfix-mailmng_domain_toggle" md5$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/mailmng" target="/usr/local/psa/tmp/postfix-mailmng" md5="30fe88e09f8e03fde412ac1dee$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/mailsrv_entities_dump" target="/usr/local/psa/tmp/postfix-mailsrv_entities_dump" md5$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/libpleskauxprop.so" target="/usr/lib/sasl2/libpleskauxprop.so" md5="775f4b9d0f15220f$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/plesk_saslauthd" target="/usr/lib/postfix/plesk_saslauthd" md5="7fde8fbed7cc0a0be3ee$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/common/poppassd" target="/usr/local/psa/admin/sbin/poppassd" md5="bbed887f185f641a214fd4f7f0$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/common/mail_grey_restore" target="/usr/lib/plesk-9.0/mail_grey_restore" md5="e7c517afda05193$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/common/mail_auth_dump" target="/usr/lib/plesk-9.0/mail_auth_dump" md5="2ab87d8427861a595c69a$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/common/mail_auth_view" target="/usr/lib/plesk-9.0/mail_auth_view" md5="4795ea1450f01b7283856$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/common/pam_plesk.so" target="/lib/security/pam_plesk.so" md5="4c40ddf286660998111f5c1d5f0060$
<file name="microupdates/scripts/MU-mail_replace.sh" target="/usr/local/psa/tmp/MU-mail_rep
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/mailmng_domain_rename" target="/usr/local/psa/tmp/qmail-mailmng_domain_rename" md5="7e$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/authpsa" target="/usr/local/psa/tmp/qmail-authpsa" md5="8979b440c7bc36bebd9518f9edf883$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/mailsrv_conf_init" target="/usr/local/psa/tmp/qmail-mailsrv_conf_init" md5="1e35534e3b$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/mailmng_domain_toggle" target="/usr/local/psa/tmp/qmail-mailmng_domain_toggle" md5="ef$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/mailmng" target="/usr/local/psa/tmp/qmail-mailmng" md5="1d3f2b1a7369d951e48d20b067c5ea$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/mailsrv_entities_dump" target="/usr/local/psa/tmp/qmail-mailsrv_entities_dump" md5="9a$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/smtp_auth" target="/var/qmail/bin/smtp_auth" md5="6804e099be4540bcf27348f11c1251b0" cr$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/qmail/cmd5checkpw" target="/var/qmail/bin/cmd5checkpw" md5="3d17ee84a3843a1bd6f654f023887c69$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/mailmng_domain_rename" target="/usr/local/psa/tmp/postfix-mailmng_domain_rename" md5$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/authpsa" target="/usr/local/psa/tmp/postfix-authpsa" md5="38520b09a4de8e66ceead3153c$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/mailsrv_conf_init" target="/usr/local/psa/tmp/postfix-mailsrv_conf_init" md5="ecdd7c$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/mailmng_domain_toggle" target="/usr/local/psa/tmp/postfix-mailmng_domain_toggle" md5$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/mailmng" target="/usr/local/psa/tmp/postfix-mailmng" md5="30fe88e09f8e03fde412ac1dee$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/mailsrv_entities_dump" target="/usr/local/psa/tmp/postfix-mailsrv_entities_dump" md5$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/libpleskauxprop.so" target="/usr/lib/sasl2/libpleskauxprop.so" md5="775f4b9d0f15220f$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/postfix/plesk_saslauthd" target="/usr/lib/postfix/plesk_saslauthd" md5="7fde8fbed7cc0a0be3ee$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/common/poppassd" target="/usr/local/psa/admin/sbin/poppassd" md5="bbed887f185f641a214fd4f7f0$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/common/mail_grey_restore" target="/usr/lib/plesk-9.0/mail_grey_restore" md5="e7c517afda05193$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/common/mail_auth_dump" target="/usr/lib/plesk-9.0/mail_auth_dump" md5="2ab87d8427861a595c69a$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/common/mail_auth_view" target="/usr/lib/plesk-9.0/mail_auth_view" md5="4795ea1450f01b7283856$
<file name="microupdates/MU30/dist-deb-Debian-6.0-i386/common/pam_plesk.so" target="/lib/security/pam_plesk.so" md5="4c40ddf286660998111f5c1d5f0060$
<file name="microupdates/scripts/MU-mail_replace.sh" target="/usr/local/psa/tmp/MU-mail_rep