FIXED - items placed in creative that were attached to blocks pushed/pulled by pistons don't drop anymore (thanks @100petr )
FIXED - nether warts don't drop anymore, when soul sand under them is destroyed (thanks @100petr )
FIXED - trapdoors won't disappear anymore in certain conditions
OPTIMIZED - plugin can't create duplicate rows anymore (if you have an existing MySQL database, run /rc fix-database from console when server is empty)