Bad Behaviour
We cannot support the use of eShop with this plugin at the present time. However for those that still wish to use it, so far as we can tell, there are no conflicts. But you will have to visit the Paypal Go Live Checklist and add all of the IP addresses to Bad Behaviour’s whitelist.
http://quirm.net/wiki/eshop/troubleshooting/compatibility-with-other-plugins/