I'm very sure that this isn't a duplicate of MC-5178 I even asked my friends, all of them, with different computers and specs ofcourse, and they all had the same issues as me.
Check the .txt that I've attached.
It seems like alot of people are affected by this at the moment,
I have this problem too, I've checked on multiple computers and versions, computers which I've tested on:
iMac (OS X) ver. 10.8
Windows 7 32bit
Windows 7 64bit
They all have the same problem with those stitches between blocks, all computers also have flickering if you're looking at for example leaves from a distance, walking into a forest and seeing all the flickering is really ugly and annoying, and it's ruining the game experience. Note - all blocks actually are flickering from a distance.
I've reinstalled my entire computer due to this bug, since I thought it occured due to graphics drivers or something wrong with my hardware, but when I checked on different operative systems and 32 & 64 bits, my conclusion is that something in Minecraft is where the problem is.
Minecraft's graphical issues seems to be these at the moment, which I've noticed so far:
Stitching between blocks
Flickering blocks from a distance (with flickering I don't mean that they disappear and reappear)
Minecraft doesn't know how to render textures properly, from a distance
I've tested with optifine and not optifine, no difference.
These graphical issues are NOT caused by graphics cards / drivers, since I've tested it myself...
Please fix this, I don't want to waste ANY more time to this, I've literally spent 20 hours + trying to find a fix, researching etc.
I updated it, still the same issues, it's not my computer, neither my friends'.
They all have the same issues as me as stated above.