I’ve upgraded WordPress to version 1.5.1. It was as easy as the installation instructions make it out to be. The only extra step was running my script that sets all the file permissions for secure PHP operation, as described in Securing PHP applications at Sonic.net.
This new version includes the fix for the problem with sending email when running in safe mode.
Coincidentally, my web hosting ISP, sonic.net, has turned off safe mode in their PHP installation, making all the safe mode workarounds I’ve been blogging about no longer necessary. Life has become simpler.