Quote from iiPod
The background to your breaking animations must either be transparent or 50% gray. If it's darker, it will make the block darker and if its lighter, lighter. Thats probably your problem.
Quote from OneWingedPie
If the breaking animation is white, then the block will glow, to "fix" it just make the breaking animation darker or actually make one, if not the. I'm not sure
Thanks guys, this fixed it!