[MC-30599] Odd box like sections of map raised in air about 50 blocks

there are sections of the map that generated with blocks about 100x100 and where 50 blocks straight up. Completely flat smooth sides all a round. a perfect cube

Environment

windows 8, java 7u21,vanilla, faithful resource pack, survival

Linked issues

duplicates 2

MC-315 Chunks do not delete properly remaining in a newly created world if the same world name is reused Resolved

MC-30202 Sliced Off Land Resolved

Comments 3

Ezekiel 2013-09-10T00:32:59Z

Can you provide coordinates and a seed?

Also, is this a concern in the latest snapshot?

migrated 2013-09-10T00:35:53Z

Are you attempting to run an old map created prior to 1.7 snapshot?

kumasasa 2013-09-10T05:05:53Z

Duplicate of MC-315 and / or MC-30202