Still present in 1.8.3
1.8.3 has this bug
The block is powered by redstone, so the piston is powered from one block above.
Anyway why the pistons on left are working differently from pistons on right?
The structure is simmetrical and those pistons were working properly in previus versions.
Why you say "from 2 blocks above" ? It's only one block above...
If you see the set of piston on the right and the set of piston on the left have different behavior even if the construction is exactly specular.
not solved
[Mod] Mustek why you assigned "Status: Resolved" "Resolution: Duplicate" ?
new screenshots
These pistons were working in previus versions
@Sonic did you watch the attached images?
Not resolved
1.8.4 has this bug