I have an older oscommerce site (not sure what version, oscommerce 2006 downloaded september) ?
I have the paypal ipn module (downloaded around the same time) and it has always worked flawlessly but now it is not working.
It seems to happen under computers with internet explorer. When a paypal order is placed the customer is sent to the paypal site but they get a strange paypal screen that just has "click here to retry" on it. Under firefox it works fine.
Sorry for the basic and ridiculous sounding question.
Any advice is greatly appreciated as I am losing sales from this.