Thanks for the follow-up :-)
I mentioned the splash page because I read in another s2member thread that users should be seeing a blank screen when they are returning from PayPal after purchase instead of text. Perhaps that is not true. Do you think this is a PayPal problem?
A blank screen after checkout would not be the expected outcome. Customers should be greeted by your Auto-Return handler. s2Member comes with a default Thank-You page for PayPal’s Auto-Return feature. The customer should either be instructed to register, or to await email confirmation; depending on the type of purchase.
Please see: Dashboard -› s2Member® -› PayPal® Options -› PayPal® PDT/Auto-Retun Integration
It sounds like you may have a conflicting plugin somewhere, or a possible configuration issue. I can confirm this does not occur in a default installation of WordPress® together with s2Member®. Tested today on a clean installation of WordPress® running no other plugins and a default WP theme. Running the latest versions of both WordPress® and s2Member®.
If problems persist, please setup a test installation and try to reproduce the issue there. If you can reproduce this on a clean installation of WordPress®, we’ll be happy to take a closer look for you. Please see this article for some clarification about the scope of our support services.
s2Member® » Support Policy
Also. Please note that s2Member can be instructed to keep logs of it’s communication with PayPal®, so that you can take a closer look at what’s going on behind-the-scene. Please see: Dashboard -› s2Member® -› PayPal® Options -› Account Details -› Logging