IE7 still has a few minor problems, but now at least you can configure the WYSIWYG block, and the block types don't end up with a horrible doubling up after being dragged.

IE6 appears to not have the random error when dropping a block when it's native rather than run through wine. The block types now sit at the top in their container nicely, and can even be dragged and dropped reasonably nicely, but the top pane roughly doubles in size while they're being dragged. IE6 is still disabled for now.