Stuff…

Was trying to add a database user via the control panel and received the above error message.
Fix by running:
mysql_upgrade -uroot -ppassword
Or add the table servers in database mysql:
CREATE TABLE `servers` (
`Server_name` char(64) NOT NULL,
`Host` char(64) NOT NULL,
`Db` char(64) NOT NULL,
`Username` char(64) NOT NULL,
`Password` char(64) NOT NULL,
`Port` int(4) DEFAULT NULL,
`Socket` char(64) DEFAULT NULL,
`Wrapper` char(64) NOT NULL,
`Owner` [...]

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OS: CentOS 5.4
Control Panel: 9.3
Was getting errors from a PHP script when it was trying to run a long task (over 60 seconds) under mod_fcgid distributed with Plesk.
The errors we saw were:
[Mon Apr 12 15:40:56 2010] [warn] (103)Software caused connection abort: mod_fcgid: ap_pass_brigade failed in handle_request function
[Mon Apr 12 16:28:31 2010] [error] [client 1.1.1.1] Premature [...]

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OS: Linux
CP: Plesk 9.x
Where does Plesk 9.x store backups generated from the scheduled backups initiated via the control panel.
/var/lib/psa/dump stores a lot of backups including the psa mysql database backup (incase you, or Plesk, corrupt the psa database).  Client backups can be found in: /var/lib/psa/dump/clients
The backups of the vhosts/www data appears to be in tar.gz [...]

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Looking to move back to qmail from postfix due to all the issues introduced by Plesk when using Postfix.  Unfortunately Parallels have produced an extremely flaky implementation of the Postfix MTA in their Plesk 9.x control panel software and have not been able to fix the bugs in months.
The following article describes the process of [...]

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OS: CentOS 5.4
CP: Plesk 9.3
MTA: Postfix
Plesk appears to have a bug in it where if you disable a domain mail function Plesk leaves various entries in the postfix mailertables.  For example, domain test.com has mail disabled on it, but, Plesk leaves entries in the following mail tables used by postfix:
/var/spool/postfix/plesk/alias.db:
_plesk_bounce_test.com
/var/spool/postfix/plesk/virtual.db:
@test.com
root@test.com
postmaster@test.com
mailer-daemon@test.com
anonymous@test.com
drweb@test.com
This is a big problem when [...]

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