PGC have just posted this on Facebook:-
"As many of you have noticed we haven't been updating Souvenir data for a while. We lacked some data in the new API from HQ and have therefore waited on an update.
There was a new version of the API released yesterday which had the information we needed and we have now patched our code to use this.
We have also started a process to update the souvenir data for all Geocachers. Our paying members is of top priority and we expect them all to have their souvenirs updated before the weekend."