I've had problems with the dataset visualizer that comes with 2005 and 2008 blowing up on me. I can't recall the error at the moment, but I would think that because it is intermittent that it is data dependent. Then again, the visualizer should be capable of displaying whatever can be put into a ds, or at least not blow up.
Does anyone know of a good alternative ds visualizer?
You might be interested in checking out Mole.
I haven't used it extensively, but I do like it from what little I've used it. It seems like a very powerful visualizer. I also hear that it's gaining traction over at Microsoft for their internal development.
I've recently created a new dataset visualizer for personal use but have decided to share it at http://www.srsoftware.co.uk