The Meaning of Life, the Universe, and Everything.
England, United Kingdom
If you have an AMD graphics card, you've likely noticed how awful your clouds look. They're spikey, and you can see where the "chunks" of them stitch together. Sheep, trees, and snow also look really weird - as if their textures are fighting. This mod fixes that by increasing the bit depth from 8 to 24.
You might have seen another mod that fixes this, but I noticed something about it; it also changes a few other minor things that were totally unnecessary and unrelated to this bug. Another thing is that it used original code from the author of the mod. This mod is different in that it uses just three lines of code, all of which were taken directly from Beta 1.8.1's source (which doesn't have this bug). Because of this, this mod is irrefutably the best way to fix this bug - it only changes the code that's necessary, and it uses only code that Mojang wrote. This mod will never be updated, because it's perfect.
So that's about it. This is a must-have mod if you have this bug, and it does nothing but fix this bug, with absolutely zero side-effects.