I've updated the VMPlot type, for slices and projections, to use a different method of setting the data. This should enable MUCH more ease-of-use with callbacks, for instance, and also some speed increase.
If two of you could grab the diff, apply it and see if it works for oyu in your standard tests, that'd be awesome. If it does, just click on "Review" on this page and then "Ship It" and I'll commit it.
PS I am liking review board. Email notifications are going to be set up shortly