Warez Monster said:Microsoft has warned public beta testers to burn downloaded Vista ISOs to disc at speeds as slow as 1X or 2X in order to get a reliable burn.
It says a key reason behind installation failure of Vista is that many DVD burners cannot reliably burn a disc at high speed.
The interesting tidbit was included in the release notes for the interim update to Vista Beta 2 (build 5456.5; not publicly available) and sheds light on the magnitude of the problem of unreliable DVD burns.
http://www.apcstart.com/site/dwarne/2006/07/640/burn-slower-or-risk-data-loss-advises-microsoft
I burned mine at 12x speed with no problem.