WordPress config & database charset 

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As part of upgrading to WordPress 2.7, the character encoding of some existing posts appeared suddenly broken.

Turns out that the charset specification from wp-config.php was not interpreted correctly any longer as UTF-8; changing the name from ‘utf8‘ (without dash) to ‘utf-8‘ did the trick.

Update Feb 24: my error log shows lots and lots of warnings like these:

WordPress database error Unknown character set: 'utf-8' for 
  query SET NAMES 'utf-8' made by require, require_once,
  require_once, require_once, require_wp_db, require_once

The right solution seems to remove (comment) the line specifying the DB_CHARSET alltogether:

/** Database Charset to use in creating database tables. */
// define('DB_CHARSET', 'utf8');

Read more about editing wp-config (wordpress.org)…

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