Today, I was burning backing up a lot of photos onto a DVD and I realised that it was taking absolutely ages (it estimated 2 hours). I guessed that this was something related to the slow Zip extraction bug, but after a bit of Googling, I found out that there is no patch or KB entry for this bug.
I worked out that this bug is caused by vista trying (and failing) to multi-task. Basically, it it burning one file and trying to create a thumbnail over and over again resulting in the CD drive spinning up and down over and over again.
The only way that I could overcome this problem was closing all explorer windows related to the files that are being burned ie. the source folder, and the CD drive window.
I have filed this bug with Microsoft, but they have so far made no response…