Fixed guest posts sometimes being displayed more than once in topic view.
Fixed BBCode validator not allowing certain code tag combinations.
Fixed install e-mail check in install script not corresponding to check in email.php.
Reworded database name description in install script.
Fixed error when supplying install script with non-existant database layer.
Fixed supplying post script with both a forum ID and a topic ID leading to the subject textbox being displayed even though it wasn't used.
Fixed users sometimes being assigned the wrong rank.
Fixed any directory in lang/ being considered a valid language pack.
Fixed username dupe check not working properly in PostgreSQL.
Added protection to prevent administrators from deleting or demoting all administrators of a board.
Fixed language and style drop-downs not always being sorted properly.
Fixed registered users being able to send “form e-mail” to the guest account.
Fixed profile showing the language for the current user when viewing the profile of another user.
Fixed username “Guest” or user ID 1 (via GET) being accepted when adding a ban.
Forced template includes into folder /include/user/ to prevent potential code inclusion vulnerability.
Prevented search from allowing particularly server intensive searches (misuse of wildcards).
Added direct execution prevention to quickjump cache.
Lowered PunBB's error reporting level to E_ALL ^ E_NOTICE to ease integration with applications that do not support E_ALL.
Fixed various SQL injection vulnerabilities in the admin interface (only exploitable by admins and mods).
Added
HTML escaping of the redirect
URL.
Added
HTML escaping of the missing language pack error message.
Fixed extern.php not using cached config.
Fixed certain BBCode combinations resulting in garbled output.
Fixed words containing the characters of BBCode's not being properly added to the search index.
Removed remark in install script instructions regarding spaces after the closing PHP tag which didn't make sense since config.php does not contain a closing PHP tag.
Fixed SQL injection vulnerability in profile (only exploitable when register_globals is on).