MegaTreePreview defect fix and Nutcracker raster enhancement

Michael, I realized I screwed up my attempt at branching (forgot to switch back to master in between each).
I've killed the other branches and merged this fix and the Nutcracker raster change to my master.
Also on here is some debug level logging that should not affect anything.
The logging config (app.config) change is reverted in this branch.
I'll do a better job of branching next time.