I'm not sure if these should go here or in bugs, but there's a few nit-picky texture things I've noticed when doing a texture pack. So far, out of all the stuff I've done textures for, Industrialcraft has by far been the most pleasing to work with. I absolutely love the way all the machines have been done, where each side of the block can have a unique texture, which you can change freely for the active version. There's only a couple of things I found weird.
With the wearable stuff, the CF sprayer backpack uses the same texture as the batpack, and there's only one jetpack texture that both of them use; static boots use the same texture and inventory icon as the regular rubber boots as well. I'm not sure if this is intentional or what, but it'd be nice to have the option to do seperate textures for all of them, even if they're just copy-pasted from the others by default.
The electric treetap also uses the same inventory sprite as the wrench, which looks a little odd.