What kind of an error is this?

[NetCafe]

We have over 20 servers and all were working fine until ALL of tham shows this upon login to WHM. Even updating mysql, recompiling apache and upgrading mysql to 4.2 doesnt solve it.

Any ideas?

Important Notice: Incompatible versions of Mysql 4.0.x and NPTL based systems.
If you are running a newer linux system which is NPTL based (CentOS 4, Fedora 3+, RHE 4, etc) and are having problems with MySQL 4.0.x (versions later then 4.0.23*), we recommend upgrading to MySQL 4.1.x as we have determined that there are compatibility issues on these platforms. You can easily upgrade to 4.1.x by changing the Mysql Version in Tweak Settings
If you are worried about compatibility with MySQL 4.0, be sure to check the box labeled: Use old style (4.0) passwords with mySQL 4.1. in Tweak Settings.
If you are unsure if your system is NPTL based, run getconf GNU_LIBPTHREAD_VERSION at the command line and see if it displays NPTL.
* 4.0.23 does not have any known issues, but is subject to security vulnerabilities: http://cve.mitre.org/cgi-bin/cvename...=CVE-2006-1516, http://cve.mitre.org/cgi-bin/cvename...=CVE-2006-1517

[mitul]

This is a notice from cpanel. It will be applicable to your servers if they fall in NPTL based systems. Else will not be applicable.

Regards,