Hey Donncha, thanks for supporting this plugin and helping those of us who were previously running multi-domain WPMU setups make the jump into 3.0.

I only ran into one issue with my setup, which was that I run with the wp-content folder in a non-standard location, by defining WP_CONTENT_DIR in the config file. The sunrise check in domain_mapping.php was failing because of this (since it’s checking ABSPATH/wp-content), so I updated this one line to check for and use WP_CONTENT_DIR and it seems to be working fine.

Are there any other potential issues with that approach that might come back to bite me that you can think of?

Thanks again.