Could you please write to VSO Software (responsible for the burning engine) using this form http://download.vso-software.fr/vsorep.exe. (include perhpas a link to this forum in the message)
If in fact nothing has changed on your computer or with your burner since the update of the software and you are still using the same media you were with the previous version, it is possible that something is wrong with the burning engine update (despite the fact that VSO has not recieved specific complaints for this issue).
With your help and others (if here on forum and experiencing the same thing) by writing to VSO, the faster and we may be able to collect this information that could potentially find a solution, if it is in fact the update that caused the problem.
Thanks in advance.