Hi Steve,
Sorry for the delay in responding.
Contribution is more than welcome!
I wrote this plugin to support a project I was working on, so I can say as a fact that I’ve only looked at the standard fields that my project was using. I did read somewhere not to bother using the grouped fields like ‘address’ because they’re an accessibility nightmare – maybe something worth adding to the to do list if it is issue.
There’s two other bugs reported, I’ll let you know once I’ve sorted those out and update the copy on GitHub. (I’m almost certain the copy on GitHub is out of date.)
PS: I’m glad I’m not the only one that sees versioning on GitHub as a pain – it means I end up with a version on my development environment, the wordpress SVN and GitHub – argghh !