Using xF inside canvas as a web app, nothing loads other then a white page. I tried with a test version of my fully working 1.1.3 version upgraded to 1.1.4 and also with a fresh 1.1.4 install. Admin back end works fine.
This is the clickjacking prevention. You will need to edit the ViewRenderer to remove it currently, but I'm looking at making it a config.php option in the future.
We actually filed a ticket on it, but found out it is possible to work around this using <Location> or <Directory> settings in the vhost file for the domain.
However, it would be great being able to configure the setting in Admin CP.