I have a 451S that has worked like a charm for over a year. I flashed it to a 832S with VS0E and since then the end of all my burns are unreadable. I am only using 4x DVD-R. The discs are from the same spindle as I was using before I flashed without a problem. Nero InfoTool says they are Princo but they are unlabelled. I flashed to VS0G and the same problem. I also think it takes longer to write but that could be my imagination. For example, I wrote 6 700mb video files in data format to a DVD. Playing the first 5 are fine. When I open the last one in WMP it freezes and the drive just keeps flashing green and all I can do to get it to stop is open the drive - even after I end task on WMP it keeps flashing. When I wrote a DVD in MPEG1 format with 10 tracks the 9th track was partially playable and the 10th track not at all. This was on a DVD player and in the DVD drive. If I have to I will revert back to 451S with authentic firmware but I'd like to know if there is anything I could do to solve this problem, or discover the cause of it. If anyone can help it would be great.