Every block has this 'square' around them. Even the torch in my hand has it.
This is a graphics card specific issue. It does happen to some, not everyone
MC-9044
Minecraft lwjgl fail
Resolved
Duplicate
0
Bart Sm.
(Unassigned)
Unconfirmed
lightning, lwjgl
Minecraft 1.4.6, Minecraft 1.4.7
Retrieved
26th Duplicate of MC-1794, please use the search function to see if your bug has already been submitted. Currently over 51% of tickets are being closed as duplicate.