I'm having problems using the High Speed Dubbing -method with the recorder. It creates DVDs that freeze (and after a while an error message is displayed: the disk may be damaged...). The problematic blanks are 4speed Verbatims (of MCC origin bought in a spindle of 25) and cheap Commodores. Jewel case packed 4speed Verbatims and 2speed Verbatim DVD-RW work fine. If I use DVD-video creation the problem is the same. The problematic blanks work fine if I use Rate Conversion Dubbing (I guess the recording speed is slower). My question is: is this recorder working normally or should I return it for a replacement unit?