I'm still having problems with 6.5.0.0 and Paypal callbacks not coming through. I noticed this problem...
Some payment modules have a neat feature where if the callback, success or failure urls contain "host:port" then these will be replaced with the actual values for the site, this allows a default URL to be put in the module that works out of the box.
With Paypal the success and failure URLs are modified in this way, but the callback URL is not, and you can see this in logs:
notify_url = http://host:port/konakart/PayPalCallback.action
return = http://example.co.uk:8780/konakart/CheckoutFinished.action
cancel_return = http://example.co.uk:8780/konakart/CatalogCheckoutExternalPaymentErrorPage.action
A quick workaround is to set the callback URL explicitly. It could also be fixed in the code in modules/src
com.konakart.bl.modules.payment.paypal.Paypal.java
change:
parmList.add(new NameValue("notify_url", sd.getPayPalCallbackUrl()));
sd.setPayPalReturnUrl(sd.getPayPalReturnUrl().replaceFirst(hostPortSubstitute,
info.getHostAndPort()));
sd.setPayPalCancelUrl(sd.getPayPalCancelUrl().replaceFirst(hostPortSubstitute,
info.getHostAndPort()));
to:
sd.setPayPalCallbackUrl(sd.getPayPalCallbackUrl().replaceFirst(hostPortSubstitute,
info.getHostAndPort()));
parmList.add(new NameValue("notify_url", sd.getPayPalCallbackUrl()));
sd.setPayPalReturnUrl(sd.getPayPalReturnUrl().replaceFirst(hostPortSubstitute,
info.getHostAndPort()));
sd.setPayPalCancelUrl(sd.getPayPalCancelUrl().replaceFirst(hostPortSubstitute,
info.getHostAndPort()));