chalkboard sprites are still missing (I'm told its the shimmier that's missing); it defaults to normal lemmings when playing a Chalkboard themed level.
If someone needs to manually create a shimmier sprite for this set I can do that.
Shouldn't need manual sprites; they're recolors of the standard ones. The style just needs to be reconfigured to use the recoloring system.
EDIT: Fixed for next styles update.