I have had both success and now recent failure burning 850mb on 99/850 mins CDR. I have been getting failure messages from Nero at the VERY END of the burn process. One error reads "invalid writestate" and another says "could not perform end of (something, I forget)". My burner is campatible so this is not the problem. I am using the CompUSA 99 min gold CDRs and trying to burn exactly 850mb of data (1 file) in UDF/ISO mode with the latest version of Nero. Can anyone help explain what is happening and how to fix? Thanks