When you click, it acts as if you we're holding shift while clicking.
MC-1844
Shift-Clicking Bug
Resolved
Duplicate
1
Isaac Garcia
(Unassigned)
Unconfirmed
Minecraft 1.4.2
Retrieved
Not A Bug, A Feature Rather, It Is A Bug That It Turns Itself On Though. The Feature Is Called Shift-Lock And Is Activated By Pressing Left And Right Shift At The Same Time, To Deactivate Press The Right Shift Button.