Confirmed. Having re-enabled my PPA, I was able to delete it without getting an OOPs report, and got the message "Deletion of 'PPA for Robert Wall' has been requested and the repository will be removed shortly."
Confirmed. Having re-enabled my PPA, I was able to delete it without getting an OOPs report, and got the message "Deletion of 'PPA for Robert Wall' has been requested and the repository will be removed shortly."