Transparent poly errors

hi everyone!

I’m facing a problem on my laptop’s geforce 4 go (that is a NV17)
textured transparent polys always have white or black edges, so that you can see the wireframe. that’s horrible and yet I can’t figure out what’s the problem. never seen it on desktop pc graphics boards and I also checked several times that no states are disabled/enabled that shouldn’t be.
some people told me there is a problem with the opengl implementation, but if it really was a bug I wonder why I can’t see things like that in other opengl applications.
maybe someone can help me.