Same problem now.
using the latest version.
the tables are created in the wordpress database, but no data is getting entered.
Tried testing in paypal sandbox, transaction works fine money goes into the paypal account, return to the website but nothing on the wall, no update to total. No data is getting entered into the tables.
Tried it with IPN active and deactivated, same result.
Anyway, love the work, hope to get it working soon. if you have any suggestions, that would be awesome.
Just on other ideas.
Might be good to have a function so when people make a donation, they are also entered into the user database, and sent a password. Thinking a donation area on a site with a few extra things for users when they are logged in.
