I installed and set up this widget very quickly and it works very well. Nicely done.
There is one minor issue with the "Return Page" option. I have created a "Thank you" page on my site and then copied the permalink into the return page URL field. When the person donating is finished on PayPal they are prompted with a "Return to my site.com" option. When that is clicked they return to my home page.
Have I inserted the wrong URL in this field or is there something I need to do on the PayPal end to make this work properly? I checked PayPal and the only thing I can see there is my site URL. There is no option for defining a return page on the PayPal end.