I have the base and the comments activated however the regular WP comments show up and on the backend I've noticed that activating the SFC Child Plugin does not add to the "Simple Facebook Connect" settings menu.
When using Chrome the admin pages (all of them) give me the following error:
And on the blog itself in Chrome I get this error -
Uncaught TypeError: Cannot read property '_onLoad' of undefined
This happened to me with both the /trunk and the current version of the SFC plugin on .org