Mamash, do You know if a patch for version "0.3-stable" is available?
In errorlog I find this:
[14-wrz-2009 15:14:28] MDB2 Error: unknown error (-1): _doQuery: [Error message: Could not execute statement]
[Last executed query: DELETE FROM session WHERE sess_id='p76079uk0csekjqml8sv15b7e1']
[Native code: HY000]
[Native message: unable to open database file]
[14-Sep-2009 15:14:28 +0200]: DB Error: MDB2 Error: unknown error Query: _doQuery: [Error message: Could not execute statement] [Last executed query: DELETE FROM session WHERE sess_id='p76079uk0csekjqml8sv15b7e1'] [Native code: HY000] [Native message: unable to open database file] in /var/www/roundcubemail-0.3-stable/program/include/rcube_mdb2.php on line 630 (POST /poczta2/?_task=&_action=login)
[14-wrz-2009 15:14:28] MDB2 Error: unknown error (-1): _doQuery: [Error message: Could not execute statement]
[Last executed query: INSERT INTO users
(created, last_login, username, mail_host, alias, language)
VALUES (now(), now(), 'user', 'localhost', '', 'pl_PL')]
[Native code: HY000]
[Native message: unable to open database file]
[14-Sep-2009 15:14:28 +0200]: DB Error: MDB2 Error: unknown error Query: _doQuery: [Error message: Could not execute statement] [Last executed query: INSERT INTO users (created, last_login, username, mail_host, alias, language) VALUES (now(), now(), 'user', 'localhost', '', 'pl_PL')] [Native code: HY000] [Native message: unable to open database file] in /var/www/roundcubemail-0.3-stable/program/include/rcube_mdb2.php on line 630 (POST /poczta2/?_task=&_action=login)
[14-wrz-2009 15:14:28] MDB2 Error: unknown error (-1): lastInsertID: [Error message: Could not get last insert ID]
[Last executed query: INSERT INTO users
(created, last_login, username, mail_host, alias, language)
VALUES (now(), now(), 'user', 'localhost', '', 'pl_PL')]
[Native code: 00000]
[Native message: unable to open database file]
[14-Sep-2009 15:14:28 +0200]: PHP Error: Failed to create new user in /var/www/roundcubemail-0.3-stable/program/include/rcube_user.php on line 452 (POST /poczta2/?_task=&_action=login)
[14-Sep-2009 15:14:28 +0200]: PHP Error: Failed to create a user record. Maybe aborted by a plugin? (POST /poczta2/?_task=&_action=login)
[14-wrz-2009 15:14:28] MDB2 Error: unknown error (-1): _doQuery: [Error message: Could not execute statement]
[Last executed query: DELETE FROM session WHERE sess_id='p76079uk0csekjqml8sv15b7e1']
[Native code: HY000]
[Native message: unable to open database file]
[14-Sep-2009 15:14:28 +0200]: DB Error: MDB2 Error: unknown error Query: _doQuery: [Error message: Could not execute statement] [Last executed query: DELETE FROM session WHERE sess_id='p76079uk0csekjqml8sv15b7e1'] [Native code: HY000] [Native message: unable to open database file] in /var/www/roundcubemail-0.3-stable/program/include/rcube_mdb2.php on line 630 (POST /poczta2/?_task=&_action=login