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We have been receiving feedback from our customers in regards to the latest firmware update “System Firmware 6.00.52 (IQ4 Firmware 4.00.58)” for the IQ4 backs. The latest update leads to an issue in triggering the IQ4 series back with:• ALPA SILEX• ALPA 12 FPS• ALPA Sync Release MK IIWe recommend our customers using an IQ4 back to remain with a firmware system lower than 6.00.52/4.00.58 until we have found a solution together with our partner Phase One.