-Chest items duplicate when you place a second chest right after putting items in the first.
-Can place items on top of yourself in certain situations.
-When clicking inside of a chest it sometimes crafts items.
-There are certain cases when save files become corrupted. Still working on replicating this.
I have created a new forum for bug tracking here: http://www.tileminer.org/forums/forum/report-a-bug/
Someday I may have a formal bug tracker but for now this will work. Post any bugs you find there:) Happy hunting!