{ROOT_PATH} should take you to the board root path while in the ACP, but instead it to takes you to adm/. This var doesn't seem to be used in any of the template files. However, in the icons and attachments pages we define {PHPBB_ROOT_PATH} which works correctly. {ROOT_PATH}

should be fixed,

{PHPBB_ROOT_PATH} removed, and the uses of {PHPBB_ROOT_PATH}

changed to use

{ROOT_PATH}

.