Hi,
I just wanted to mention an issue:
I clicked on the link to edit the front end of a module with SP Builder, which brought me to the front end with a request to log in to edit, which I did, and then it gave me a 404 page with error message:
array_replace(): Argument #1 ($array) must be of type array, string given
Error message kept showing until I deleted the cache (and was logged out). So I guess, no editing the front end with SP Builder...