I am seeing a bug with the icicle model.
I created an icicle model using the default settings (see page 1 of the attached PDF). When I click on the Node Layout to see how things are laid out, I get page 2 of the PDF. As you can see, it seems to be one row short in the layout since it should be 3,4,5,4, but is showing 2,3,4,3. Also, there are no nodes 1 to 4, and nodes 79 and 80 are to the left of nodes 5 and up.
In the sequencing tab, if I drop an "ON" effect on the model, the top row of the icicles don't light up (see page 3 of the PDF). You can see this both in the model preview and the nodes on the model.
If you need more information on this, let me know.
Jon