Aegir installation issue
Here is an issue on Drupal Groups: http://groups.drupal.org/node/96639.

Possible solutions:


Check if your system is Ubuntu (the installation script assumes that
it is)
Remove everything in /var/aegir and run the installation script again.
Run 'mysql_secure_installation' command and finish it successfully. Aegir
checks for security flaws during installation and block it if, for
example, you have anonymous users enabled in mysql.