Right now ALLOW_ALL_DOMAINS is only being used in the stream function - not the download function, which is what you see here. Are you embedding direct download URLs offsite?
Dazed:just ran both again. Same thing. Suggestions?
Unfortunately no - there's nothing I'm aware of that is going to make just the profile_url variable disappear. I only have a couple mins left online here as I am just about to head out, but I can check it out for you in the AM and see if I can see what's up.
Try disabling the extra fields to see if that is the cause - shouldn't be since we use custom form fields here on jamroom.net and I'm not seeing any issues, but it's worth testing.
There are add_to_cart_section and add_to_cart_price CSS classes that should allow you to customize it. It's a complicated function, and customizing it will likely break it. Note that there is a jrFoxyCart_add_button function you can use if you just need the button.