Block placing is all fixed up now and slime's won't lunge into you anymore either.
Now that is out of the way I will be starting on the 1.8.1 conversion starting tomorrow. By default most the new features will be disabled due to a lot of maps are based on the pre 1.8 behavior of various game mechanics. Maps though will be able to enable/disable whichever features they like.
Now go check out this tool pack trailer for doom style maps that tKm and Arkia are putting together.