FAQ 2. Configuration

FAQ 2.1 The error message "Warning: Cannot add header information - headers already sent by ..." is displayed, what's the problem?
FAQ 2.2 phpMyAdmin can't connect to MySQL. What's wrong?
FAQ 2.3 The error message "Warning: MySQL Connection Failed: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111) ..." is displayed. What can I do?
FAQ 2.4 Nothing is displayed by my browser when I try to run phpMyAdmin, what can I do?
FAQ 2.5 Each time I want to insert or change a record or drop a database or a table, an error 404 (page not found) is displayed or, with HTTP or cookie authentication, I'm asked to login again. What's wrong?
FAQ 2.6 I get an "Access denied for user: 'root@localhost' (Using password: YES)"-error when trying to access a MySQL-Server on a host which is port-forwarded for my localhost.
FAQ 2.7 Using and creating themes
FAQ 2.8 I get "Missing parameters" errors, what can I do?
FAQ 2.9 Seeing an upload progress bar
FAQ 2.10 I get "#1045 - Access denied for user 'root'@'localhost' (using password: NO)". What can I do?