I used to get this error quite frequently but then it went away. Today I started seeing it again; about half the times I tried to save a file in Vue, this happened. Needless to say, there's no problem with disk space. Anyone have any ideas on this? I'm running the latest official update on win XP Pro, 2Gb RAM, and 111Gb left on the HD. The scene is a simple one with one ecosystem, volumetric lighting, and about 8 imported objects of varying sizes.

Steve