Scott,
There's currently a bug with the Javascript login_custom() function. We'll be releasing a fix for it in the next few days. Until then, please either switch back to the {JFBCLogin} tag or make the following code change. In the /components/com_jfbconnect/includes/jfbconnect.js file, around line 30, you'll see:
FB.login(function (response) {
jfbc.login.on_login();
}, {
scope:jfbc.scopeChange that last line to:
Clear your Joomla and browser cache and try again. That will properly request the email permission from the users.
Sorry for the trouble,
Alex