Beautifier provides several options to clean up WP's messy (X)HTML source code output, such as code indentation.
beautifier_add_indention()is now PHP4 compatible
beautifier_uninstall()to plugin options file
beautifier_clean_whitespace()is now also removing tabs between tags
E_NOTICEcaused by strict
beautifier_uninstall()is now working again
WP_USE_THEMESis defined and a valid DTD is found in the beginning of the output buffer