[ogname] does not work with OG 5.x-3.1

Using OG 5.x-3.1 and Pathauto 5.x-20.beta2 on Drupal 5.2 [em][ogname][/em] does not appear in the pathauto configuration page as an option for part of a node alias. I tried using [em][ogname][/em] as part of an alias anyway but it just used the literal text.

This may well be an issue with OG rather than with Pathauto???