Use the now built-in hasGravity method instead of a PHYSICS_BLOCKS list.
Fixed a bug with the first block added to a region was ignored.
Removed a "magic number".
Removed useless delaying in rails replacement.
Fixed crash when chest and trapped chest are put next to each other.
Updated Bukkit to 1.5.1-R0.2
Wall signs text was not replaced.
Version 6.2.1