When a vine is growing from above a Cobblestone Wall, the Cobblestone Wall suddenly becomes a corner Cobblestone Wall. Technically there is a block above so the game thinks it has to update it. However, it are only vines and not something is to be expected.
To reproduce:
1. Build a Cobblestone Wall
2. Place or let a vine grow ontop of it.
Linked issues
is duplicated by 13
MC-14503
Torch Cobblestone Wall Glitch
Resolved
MC-14726
Cobblestone walls joining underwater
Resolved
MC-42515
Right clicking a flint and steel on a cobblestone wall temporarily changes the wall as if it has a torch/block on it
Resolved
MC-50281
Flint and steel with cobblestone walls
Resolved
MC-50774
Cobblestone wall top connecting with Barrier block
Resolved
8 more links
Attachments
Comments 12
Problably not fixed, because of MC-50296
2 more comments
This is working as intended. Any block placed on or beside a cobblestone wall will cause it to turn into a corner cobble wall.
Is this still a concern in the current Minecraft version 1.6.4 / Launcher version 1.2.5 ? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.