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I have got a DS-7604N-E1/4P which had v3.0.5 140508, i updated via USB stick to v3.0.8 140825 no issues. I didn't want to go whack straight up to a high firmware number, so i thought safer to step through upgrades. I went to load v3.0.10, v3.3.2, v3.3.4 and none will load now i get mismatch...