As per the subject, if I try to print in any GTK application, the GTK print dialog is blank except for the print to pdf option. If an application uses GTK without the dialog (Firefox), it can find the printers, but can't enqueue jobs. All QT/KDE applications can see and print to all configured CUPS printers just fine, as can standard cli tools.
This is a regression since upgrading from Debian 12 to Debian 13, but I'm not sure which package to file this bug against.
Patrick