The profile (CICCIO) is applied correctly when printing from a web browser, but it is completely ignored when the source file is a PDF being printed to the PDF24 virtual printer.
It seems like when a PDF is the source, the driver/backend performs a sort of 'passthrough' that bypasses the B&W and DPI constraints set in the profile, even if the profile is set as default in HKLM. How can I disable this behavior and force the 'CICCIO' profile processing for PDF sources as well?