One of the most confusing aspects of downloading multiMAN is the file name. You will often see (multiMAN CEX) and standard multiMAN.

The 4.89 firmware update was a late-stage refinement for the PS3. When paired with HEN (Homebrew Enabler), it provides a "soft" modding environment that is compatible with almost every PS3 model, including the later "Super Slim" versions that cannot support full CFW.

This happens if you have a corrupt cover cache. On HEN 4.89, hold L2 + Triangle on boot of MultiMAN to rebuild the database. Works immediately.