mm_renameField making field names disappear

I just upgraded to 0.3.8, and I’m using almost the default set-up except adding the YAMS rule to mm_rules.inc.php. I noticed when I have these rules active:

mm_renameField(’longtitle’, ’Page heading’);
mm_renameField(’description’, ’Search engine description’);

Those two field names just disappear. I commented out the YAMS rule, but that didn’t seem to make any difference. Any ideas on what might be going on?

I met this problem, which started showing on a MODx 1.0.3 install on the Linux server with PHP 5.2.1, while a site with the same rules works OK on a 1.0.2 installation. I think it worked OK with 1.0.3 on my local Windows 7 + PHP 5.3.1 setup.

My workaround was to install the functions and widgets folders from the previous version, losing some newer features that I won’t miss at all. There was also a misnomer in one of the commands - I had to use mm_hideFields for the content, rather than hideSection.

KP