A German online magazine PCwelt.de reports that Nero 6 contains a "bug" that could delete your entire harddrive. The bug is introduced with the Nero 6 Recode project. Bug might even not be the correct word for it, it seems more that Ahead forgot to limit the feature to empty the destination folder for temporarily files.
If this destination directory is set to the root of a disc (e.g C : ) and if the question: "Destination folder is not empty, do you wish to clear it" is answered with yes, all files will be deleted.
Here is the description (badly)translated from the german site using babelfish:
Who clicks now over-hurried on "Yes" and had selected as goal file a root listing, short time experiences later its blue miracle: not only a "Video_ts" file put on in the goal file in former times is deleted, but also all other files and file on the partition concerned are deseamed within seconds by the plate. The user is nevertheless asked still whether he wants to delete the files.
A "Design error" is not however nevertheless. Because actually the user should assume "Nero Recode" means the existing "Video_ts" file in under "the target folder" indicated drive assembly and/or listing.
For now we would advise visitors to be carefull with this feature and to make sure to answer no on this question. There is no doubt Ahead will release a fix for this nasty feature soon.