Using OG pathauto with shared content types

I have an established community based on the latest 6.x. A while ago we added OG and have a handful of groups that share the same content types with the rest of the site. The groups are not in a subdomain like groups.drupal. I'd like to distinguish the groups using pathauto and the ogname token. The only problem is that an empty ogname token will give me two // for the rest of my site's content types that aren't in OG. Any thoughts on how to best deal with this?

Thanks in advance.