Since this issue with PayPal Advanced keeps getting worse, I am going to try and migrate these sites to Express Checkout.
I noticed there are multiple versions of that. One is just Express Checkout where they leave the site and return (no SSL required). The other is Payments Pro where they pay similar to the Advanced and don't leave the site when using a cc and the PayPal option seems to use a popup window. Which one do you prefer or recommend? BTW. I have SSL on both sites so that's not an issue.