Based on an Audit of the code, this component has the following uses of ksort without an explicit sort order which means SORT_REGULAR is applied by default and this sort behavior changes in PHP 8.2.
See: https://php.watch/versions/8.2/ksort-SORT_REGULAR-order-changes

Instances:

• ./lib/horde/framework/Horde/Imap/Client/Fetch/Results.php:        ksort($this->_data);
• ./lib/horde/framework/Horde/Imap/Client/Fetch/Results.php:        ksort($this->_data);
• ./lib/horde/framework/Horde/Imap/Client/Base.php:                            ksort($val);
• ./lib/horde/framework/Horde/Imap/Client/Base.php:        ksort($options);
• ./lib/horde/framework/Horde/Support/ConsistentHash.php:        ksort($this->_circle);
• ./lib/horde/framework/Horde/Mime/Headers/ContentParam.php:            ksort($val);