I downloaded and upgraded the newest Pioneer upgrade (56825951DVR107_FW_110.exe). This upgrade from the original firmware did not work for me. I made a number of +R and -R coasters before changing firmware. Instead of going back to orginal firmware, I decided to try the hacked (05_RPC-1+12xRip+8xDVD-R_WINDOWS_XP.zip) version. This firmware is working very good. I am now trying various brands to determine how fast I can burn. There are no limitations on brands (DVD-R) up to 8X. You will make coasters if you try to go too fast. So far I have got G04 Ritek(4x) and Verbatim(4x) to burn without error at 8X. I have only tried it with a 2GB burn.. will try full DVD burn later.