From here:

I have not tested this SMP, may have similar problems.

VERSION:
1.76pr4 for Minecraft 1.8.

DESCRIPTION:
Minecraft is crashing every time a turtle places a disk drive. Upon reloading the world a duplicate disk drive is found inside of turtle, with another disk drive placed in front of the turtle. Placed disk drive seems to interact normally with computers.

EXPECTED RESULT:
Minecraft not to crash/duplicate disk drive.

REPRODUCTION STEPS:
Give a turtle a disk drive and call turtle.place(), turtle.placeUp() or turtle.placeDown() in Lua prompt or any written programs.

Minecraft pastebin crash report if needed: http://pastebin.com/Z0DE6E8g

Confirmed in pr6
http://pastebin.com/QrS7x0QG

Can somebody try this with all the other CC peripherals/computers and tell me if it crashes for those too?

Safe:

Printer
Monitor and Advanced Monitor.
Modems - Wired, Wireless and Long Rage
Cable

Broken:

Disk Drive - Crash: http://pastebin.com/QrS7x0QG

Turtle,TurtleExtended,TurtleAdvanced - Crash http://pastebin.com/Pr6ayxA7

Computer - Crash http://pastebin.com/xXaQncMh and map corrupts http://pastebin.com/6ySQxmap
Advanced - Same as above
Command - Same as above

In cases when it crashes but map is not corrupted the item gets placed and is not removed from inventory.

Fixed in pr8