I've been using my freecom burner for a couple of months with datasafe go4's and have had very few problems. I wanted to try the Ridata discs as i know they are higher quality and i thought i could burn them at 4x with no problems because i only get no errors with 2x on the datasafe discs! I just put my first Ridata in and i get this error - Power calibration error! I realsie that this means it has a problem with the media but why? They're the best Riteks out there??? Could it be something to do with my cracked freecom firmware? My drive came with nec 1300 firmware, should i go back to that and would that make the difference! I'm soooo pi**ed off, thought i was going to improve my burning, not make problems! Might even take the burner back and say it's not good enough and get a pioneer instead. Someone please help me before i go and spend £120 on a new burner, as i can't really afford it!!!