Hi had this issue also, the solution was to delete the database entrys for paypal. and reinstall the module.
But after that now I get in the end, when the confirmation page should be displayed, I get
Error code: 0;Short message: Warning: strip_tags() expects parameter 1 to be string, array given;
The order is placed, mails are sent, and appears in backoffice and paypal website.
I'm in debug mode, and no further error is displayed.
How can I get to the source of this problem?
PS 1.7.6.7
Thanks.