I am working on a wordpress site that utilises
Buddypress and Cubepoints.
Cubepoints has an integrated module that allows users to buy points.
The Paypal Topup module is not working correctly.
It takes the payment and paypal begins the IPN but the return from paypal is failing so the users are not being updated with their newly purchased points.
This should be a very straight forward fix.
There are further APIs that will need installing also - which will posted as separate jobs - DOTPAY - the Polish payment gateway is one of these - so this later job would suit a Polish speaker.