Not exactly a 1.8 thing but I was having issues with lighting not working even though it should have been. Turns out my issue was not updating the block so the lighting visually fixed itself. I spent 3 hours redoing the code only to realize oh wait all I needed was a block update
Anyway thought I might add that so others don't waste time like I did. Time is so valuable. Great guide though, definitely something I approve of and found interesting