Well, I'm stumped. You've got a couple of extra mods I don't, but none that should make any impact on this. All I can say is it's not happening for me, so something's broken.
Things you have that I don't: Steve's Carts, Laser Mod, Magic Yarn, Compact Solars, Extra Bees, Timber, and Worldedit Client UI. Everything else you have, I also have.
If you're feeling up to it, you can try removing all of those and seeing if it helps at all. Another option is to rebuild your minecraft.jar from scratch, using different install orders for the mods that go in there (MultiMC helps a lot with this, if you don't already have it). For reference, my install order is: Forge, Optifine, CodeChickenCore, NEI. Swapping Optifine and Forge should also work.