It can be reproduced, but on Bukkit Servers, this is what i found. It appears to be an enlarged fence. then turns into a sign. But no crash on the server nor client. This could be a vanilla thing, I have screenshots.
http://imgur.com/ZdNF4F5
This is on a Bukkit server. Jackson and I have tried on a Vanilla server and failed not to crash. Server dis not crash.
It can be reproduced, but on Bukkit Servers, this is what i found. It appears to be an enlarged fence. then turns into a sign. But no crash on the server nor client. This could be a vanilla thing, I have screenshots.
http://imgur.com/ZdNF4F5
This is on a Bukkit server. Jackson and I have tried on a Vanilla server and failed not to crash. Server dis not crash.