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Your language (en_AU) looks to be one of the few not supported by Facebook natively.

Please use the Facebook Locale Override setting, in the Facebook API tab of the configuration area, to specify a different one. For English, I'd recommend en_US or en_GB. There's a link to a full list of supported language strings in that tab.

Hope that helps,
Alex

Glad to hear that got you going. If you need anything else, just let us know!

Also, please consider leaving a rating and review on the JED for JFBConnect and/or our support. It's certainly not required, but very appreciated:
extensions.joomla.org/extensions/social-...ook-integration/7215

Thanks,
Alex