I’ve now fixed the bug on the Author page of this blog (Did any of you notice?), so it’s no longer giving a 404 error. It turned out that author names containing spaces didn’t work when the site was configured to use custom permalinks. After a bit of Googling, it turn out the fix is to update the table wp_users, changing the field user_nicename to get rid of the spaces (So it’s “Tim-Hall”, not “Tim Hall”).
For reasons best known to WordPress themselves, the user’s nicename isn’t editable though the WordPress control panel, so you have to update the database directly. I did it using phpMyAdmin which is available on my host.
