I’ve seen the few topics related to this, and it seems nobody has posted a solution as yet.
I’ve tried to contact PayPal directly about this, and they have told me that using their button factory is a “solution,” or more recently:
Sounds like when Expression Engine is creating the buttons and inserts the button code, something in the code is causing something that IE doesn’t like and it’s causing the button to fail. I would check with Expression Engine to see what could be causing the problem.
The biggest problem I’m finding is that it really is only an issue with IE - Firefox/Camino/Safari/Netscape are not a problem at all. Has anybody managed to solve this problem?