Click on the word/link 'bitset' in my previous post to answer your questions. However, you said your player recognizes and plays +R media, so that should not be your problem, but it may help in avoiding future compatability problems. I think posting a few kprobes would be of more benefit to you. Can you also answer the question I asked as that is related to the 'bad burn' theory.
edit: thanks happymister for the clarification and support...you are quicker than I am:).