We are sorry, but a MySQL - error occurred. The administrator may find more information in syslog with the ID...

For seeing this quite often these days, here's how to fix it (most of the times).

You get an error like

We are sorry, but a MySQL - error occurred. The administrator may find more information in syslog with the ID 2e110e14094d8ad886efa2b14105632e

Checking the syslog, you might find something similar to this:

Froxlor: MySQL - Error: Establishing connection failed, exiting; ErrNo: 0; Desc: ; Script: /froxlor/customer_mysql.php?page=mysqls&s=xyz; Ref: ...

Removing the error-supressing from mysql_connect it will show the following, hopefully helpful message:

Warning: mysql_connect() [function.mysql-connect]: Premature end of data (mysqlnd_wireprotocol.c:553) in /var/www/froxlor/lib/classes/database/class.db.php on line 105

Warning: mysql_connect() [function.mysql-connect]: OK packet 1 bytes shorter than expected in /var/www/froxlor/lib/classes/database/class.db.php on line 105

Warning: mysql_connect() [function.mysql-connect]: mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication. Please use an administration tool to reset your password with the command SET PASSWORD = PASSWORD('your_existing_password'). This will store a new, and more secure, hash value in mysql.user. If this user is used in other scripts executed by PHP 5.2 or earlier you might need to remove the old-passwords flag from your my.cnf file

I hope this will save some of you from getting a heart-attack

d00p