Thanks woundedbeer, you set me on the path to salvation
I tried using the simple pagetitle:ucase, and that didn’t work, so I re-installed PHx from scratch, then got an error in the path, because of the "config[’rb_base_dir’] . "plugins/phx/phx.parser.class.inc.php";" line in the plugin. I had to then install PHx in my custom directory, eg /assets/templates/mysite/plugins/phx (because my Resource Path is set to /assets/templates/mysite/ in my Config).
Now, it’s all working like a charm!
Thanks again.