Large expanses of land unloading at random (posted screenshots)

[PsykoTenshi]

Title: Large expanses of land unloading at random

Version: 1_0_3

OS: Windows 7 Professional x64

Java Version: Java 7 Update 45 x64

Description of Problem:

I remember this bug occurring all the way from previous versions of Tekkit (several months ago), finally had enough of it.

At seemingly random, a rather big strip of land simply disappears. Reloading the world restores things to normal, with no blocks or information lost (even had my base engulfed by this once. reloaded world, and everything was there). Screenshots below:

http://imageshack.us/a/img607/4240/a3pq.jpg

I placed a dirt block on the emptyness and it was *not* returned to me. but when reloading the world, it was there, placed.

If there's a log which could have useful information, do direct me to its location (and file name), will gladly post.

P.S.: According to the Launcher, the Tekkit version I'm using is 1.1.10, but the Tekkit version field is a dropdown with only one option, 1_0_3.

Error Messages:

None.

Though better none than a box with just ''Error'' or similarly useless info imo.

Error Log: