Endurance Onslaught 6.0
It happens on my computers too. I'm not sure how it is fixed, just letting you know you aren't the only one.
<PlayerID666> samule is the coolest guy around
If you don't want the textures to be transparent at all, then don't use an alpha channel. Just use a colour like RGB 10, 10, 10 (I say this because some people appear to have problems with pure black).

You can't enable transparency with shaders on. It just doesn't work.
"Call yourself alive? I promise you you'll be deafened by dust falling on the furniture,
you'll feel your eyebrows turning to two gashes, and your shoulder blades will ache for want of wings."