My visitors are getting an error (HTTP Status 405 - Request method 'POST' not supported) when they click the ADD TO CART button on my site. If I get this error and then clear my cookies, it goes away...until the next time I log into Paypal.com to manage my account. Then I get the error from my site again...and clear my cookies and it goes away.
Obviously, I can't ask every visitor to clear their paypal cookies.
