Fixes an issue where when using the replace blocks option, the new block would not copy the original data if available (such as stairs would not copy it's original facing).
This means if configured can have stone stairs be replaced with cobblestone stairs while keeping its original information.
Fixed an issue where Pistons may not regenerate properly.
Fixed an issue where blocks (such as grass, redstone, torch, lever, etc.) that requires a support block below would usually drop.