[PROBLEM]
I've set up svnserve to handle SVN user authentication. I've done an SVN checkout with "--username myuser", but when I wanted to commit a change, I was asked for a GNOME keyring passphrase:
Password for '(null)' GNOME keyring:
I neither configured, nor am planning to use GNOME keyring or KWallet for handling my SVN logins on that machine.
[SOLUTION]
In "~/.subversion/config", there are settings which define whether SVN credentials/passwords are stored, and how. Configure the following settings to look like this: