Avahi install fails with "Call to undefined function"

[christopherd]

Running pfsense 1.2.2

Installation of Avahi hangs with "Executing custom_php_install_command()…" in the command output and
"Fatal error: Call to undefined function: delete_avahi() in /usr/local/pkg/avahi.inc on line 64"
at the bottom of the page.

I rolled up to 1.2.3 to see if that would fix the problem, and rolled back to 1.2.2 this morning.

Am I missing something simple?