Texture pack/Launcher issue

When i scroll (with my mousewheel) over a Birch sapling, charcoal. (maybe there is more) My texturepack will turn black. almost like Limbo

I had the problem with the following items: Birch sapling. Charcoal and regular Torch.

Problem happend first on a server, and i have tested it in singleplayer mode.

Steps to Reproduce:
1. Take a Birch sapling or charcoal in any slot of your hot bar.
2. Scroll, With your mousewheel over the the selected item.
3. What did happen to me, is that my Texturepack turn, or completly black,
or every block becomes invisible.

Sorry for my bad english, and i hope you understand what i trying to say.

Greeting Yordi (MCuser: DownFrack)