Also this is my upgrade result :
Parallels Products Installer 3.5.0 (build at 2009-08-17 16:48 svn rev. 0) started at (timezone CET) Tue Apr 27 08:35:23 2010
Command line args: /usr/local/psa/admin/bin/autoinstaller --enable-xml-output --source-type=plesk --target=/root/psa --select-release-id=PLESK_9_5_1 --notify-email=c.e@3xlhost.com --install-component=psa-autoinstaller --no-daemon
Try to find rcfile...
Autoinstaller rcfile not found.
Opsys detected as: os_vendor=CentOS os_name=Linux version=5.4 arch=x86_64 environment=~empty
Final opsys (with overriding) is: os_vendor=CentOS os_name=Linux version=5.4 arch=x86_64 environment=~empty
Checking hostname is sucessfull.
Downloading the file products.inf3: 100% done.
Downloading the file plesk.inf3: 11%..22%..31%..42%..51%..60%..71%..80%..91%..100% done.
Downloading the file ppsmbe.inf3: 27%..58%..88%..100% done.
Downloading the file sitebuilder.inf3: 15%..35%..75%..100% done.
Downloading the file sso.inf3: 10%..24%..51%..64%..78%..100% done.
Downloading the file setemplates.inf3: 38%..87%..100% done.
repository: Get brief packages info for all sources
Checking for installed packages...
Downloading the file PSA_9.5.1/plesk-9.5.1-cos5-x86_64.inf3: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% done.
repository: Get brief packages info for all sources
Detecting installed product components.
Component plesk/base: mode upgrade, installed=1262132883, available=1271234782
Checking if key update required for component plesk/base
Config allows upgrade from version 9.5 without key update
Currently installed component version is 9.3.0-cos5.build93091230.06
Keyupgrade need for plesk/base
Component plesk/psa-autoinstaller: mode upgrade, installed=1250502771, available=1270627882
Component plesk/php5: mode upgrade, installed=1262132953, available=1270876881
Component plesk/postgresql: mode up2date, installed=1256604566, available=1256604566
Component plesk/vault: mode upgrade, installed=1262132938, available=1270876867
Component plesk/ppwse: mode upgrade, installed=1262132910, available=1270876843
Component plesk/api: mode upgrade, installed=1262132847, available=1270876786
Component plesk/pmm-ded: mode upgrade, installed=1262132805, available=1270876745
Component plesk/sb-publish: mode up2date, installed=1179887889, available=1179887889
Component plesk/sbm: mode up2date, installed=1220864885, available=1220864885
Component plesk/cf-support: mode upgrade, installed=1262132927, available=1270876856
Component plesk/miva: mode upgrade, installed=1262132930, available=1270876860
Component plesk/billing: mode up2date, installed=1245902780, available=1245902780
Component plesk/mod-bw: mode up2date, installed=1194490345, available=1194490345
Component plesk/asp: mode up2date, installed=1223518800, available=1223518800
Component plesk/java: mode upgrade, installed=1262132853, available=1270876792
Component plesk/mod_python: mode up2date, installed=1168104152, available=1168104152
Component plesk/ruby: mode upgrade, installed=1262132928, available=1270876858
Component plesk/qmail: mode upgrade, installed=1262132945, available=1270876876
Component plesk/postfix: mode install, installed=0, available=1270876876
Component plesk/psa-firewall: mode upgrade, installed=1262132852, available=1270876791
Component plesk/psa-vpn: mode upgrade, installed=1262132892, available=1270876825
Component plesk/psa-fileserver: mode upgrade, installed=1262132845, available=1270876784
Component plesk/sshterm: mode up2date, installed=1228112978, available=1228112978
Component plesk/watchdog: mode upgrade, installed=1262132915, available=1270876846
Component plesk/cs-gs: mode install, installed=0, available=1270876789
Component plesk/battlefield: mode upgrade, installed=1262132903, available=1270876836
Component plesk/bf2: mode upgrade, installed=1262132926, available=1270876856
Component plesk/mailman: mode upgrade, installed=1262132923, available=1270876854
Component plesk/kav: mode upgrade, installed=1262132935, available=1270876864
Component plesk/drweb: mode upgrade, installed=1262132826, available=1270876765
Component plesk/spamassassin: mode upgrade, installed=1262132857, available=1270876795
Component plesk/backup-ded: mode upgrade, installed=1262132920, available=1270876850
Component plesk/atis: mode up2date, installed=1218704490, available=1218704490
Component plesk/de-DE-locale: mode upgrade, installed=1260769062, available=1269856897
Component plesk/ja-JP-locale: mode upgrade, installed=1260769157, available=1269856991
Component plesk/es-ES-locale: mode upgrade, installed=1260769085, available=1269856923
Component plesk/ru-RU-locale: mode upgrade, installed=1260769182, available=1269857017
Component plesk/fr-FR-locale: mode upgrade, installed=1260769107, available=1269856944
Component plesk/it-IT-locale: mode upgrade, installed=1260769134, available=1269856966
Component plesk/zh-CN-locale: mode upgrade, installed=1260769214, available=1269857039
Component plesk/zh-TW-locale: mode upgrade, installed=1260769238, available=1269857062
Component plesk/nl-NL-locale: mode upgrade, installed=1260769259, available=1269857079
Component plesk/horde: mode upgrade, installed=1262132901, available=1270876834
Component plesk/atmail: mode upgrade, installed=1262132821, available=1270876760
KeyUpdateChecker::doCheck: no components for check key update
repository: Get full packages info for all sources
Retrieving information about the installed packages...
read cache file
Downloading the file PSA_9.5.1/update-rpm-CentOS-5-x86_64/update-9.5.1-cos5-x86_64.hdr.gz: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% done.
Downloading the file PSA_9.5.1/dist-rpm-CentOS-5-x86_64/build-9.5.1-cos5-x86_64.hdr.gz: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% done.
Downloading the file PSA_9.5.1/thirdparty-rpm-CentOS-5-x86_64/thirdparty-9.5.1-cos5-x86_64.hdr.gz: 11%..22%..34%..40%..52%..63%..75%..81%..90%..100% done.
Determining the packages that need to be installed.
Check package set before installation
Downloading the file PSA_9.5.1/dist-rpm-CentOS-5-x86_64/opt/updater/psa-autoinstaller-3.6.0-100407.15.x86_64.rpm: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% done.
Starting installation of packages
Warning: unresolved requires '/usr/bin/lp' from redhat-lsb-3.1-12.3.EL.el5.centos.i386
Warning: unresolved requires '/usr/bin/lpr' from redhat-lsb-3.1-12.3.EL.el5.centos.i386
Warning: unresolved requires '/usr/sbin/sendmail' from redhat-lsb-3.1-12.3.EL.el5.centos.i386
Warning: unresolved requires '/usr/bin/lp' from redhat-lsb-3.1-12.3.EL.el5.centos.x86_64
Warning: unresolved requires '/usr/bin/lpr' from redhat-lsb-3.1-12.3.EL.el5.centos.x86_64
Warning: unresolved requires '/usr/sbin/sendmail' from redhat-lsb-3.1-12.3.EL.el5.centos.x86_64
Installing the package psa-autoinstaller-3.6.0-100407.15.x86_64
The packages were installed successfully.