There is reportedly a major bug in Leopard's directory-moving code, which manifests in the Finder, that can lead to significant data loss if a destination volume (where a file is being moved) disappears while a move operation is in action. The bug is reported and described on Tom Karpik's blog, and involves a situation where a file is copied from o...

	Read more at MacNN
	www.macnn.com/articles/07/11/05/leopard.troubleshooting/