I’ve released a bug fix version of Simple 301 Redirects for WordPress. Version 1.02 fixes a couple of bugs and 1.03 adds PHP4 support, which I carelessly neglected in 1.02. It seems that a lot of people still use PHP4 even though it’s been officially dead (i.e. unsupported and with no security updates) for over 2 years. You can get the latest version of the plugin by updating from your admin system or by visiting the WordPress plugin directory.