Both using the webinstaller to update as well as the classic method of updating make the database inaccessible SQLSTATE  Access denied for user … when trying to update from 2.10.0 to 2.11.0. In both cases “config.ini.php” sits untouched at the right spot. I did not fiddle with the database at all so I am not sure where this is coming from. Since I now lost two of three instances (did not upgrade the latter) any help will be appreciated.
PHP 5.4.36, MySQL 5.5.41 on a Debian 7.8