PlayStation 3 firmware v3.72 available soon - Gematsu
Downgrade your 3.71/3.72 Vita! - Hackinformer
PS3 - MinVerChk (Minimum Version Checker) | PSX-Place
PlayStation 3: Sony releases Firmware 4.86 for their 13 year old console - HFW 4.86 released, SEN Enabler updated & PS3HEN to be updated soon due to no kernel changes! - Wololo.net