Yep, due to a critical vulnerability in PHP, the programming language used to run The Typewriter Database, all photo uploads have been disabled temporarily. You can still edit and add galleries, but you won’t be able to upload or replace photos until I can properly get moved into my house (currently running loads on a 4-hour drive just about daily – gotta be out of the temporary apartment by the end of the month) and can determine that the version of PHP TWDB is running has been properly patched against the vulnerability.
Please be patient, it could be a couple of weeks. Great timing, right? :D