Hi Christian, I just wouldn't know where to start to find those log files to be totally honest. Besides I wouldn't know which information would be deemed sensitive or not so I wouldn't want to take a risk.
the transaction is fine... it completes, but the auto return url fails with an error message. This is just unacceptable as it will prompt the customer to demand a refund if not create a ton of administrative work.
I don't think there is anything wrong with the installation, its a standard basic installation that delivers a complete financial transaction, accept it fails to action the auto return after paypal complete transaction.
You mention that not everyone is having this issue, but those that are and have the ability to circumvent the error seemed to have done so by using s2member in an unintended way, which I think is an irritating inconvenience to them.
S2Member should do what it is intended to do, and it just doesn't. Is this S2Member's fault? who knows, maybe it's paypal causing the fault. Either way it's unsatisfactory as S2Member's compatibility with Paypal doesn't stack up.
I'm very frustrated with this.... I just want to be able to buy a simple solution that just works as advertised!