the data value of the alternate smooth stone double slabs(it is now 43:7) was replaced by the new nether brick double slabs, thus destroying many existing maps using this mostly unknown block.
MC-4545
alternate smooth stone double slabs(43:6) gets replaced by nether brick slabs
Resolved
Duplicate
0
Duplicate of MC-4426 , please use the search function to see if your bug has already been submitted. Currently over 35% of tickets are being closed as duplicate.