Playing Minecraft since Beta 1.5 never happened to me before.
In the recent 1.5 snapshots the textures happen to have small white spots on the edges. I have no idea what causes this bug but it's really annoying.
Environment
System: Windows 7
Java 7 ver 4
processor: Intel core i7 2600 - 3.4GHz
GPU: Radeon HD 6850
cores 4 threads 8
31st 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.