Show("blind") on table row

Show("blind") on table row

I applied a blind effect to show a hidden table row, but the slide effect isn't smooth. It immediately adds about 15px space, and then does the slide effect. You can check (and modify) my code here:  http://jsfiddle.net/Pieeeeeee/yRpsU
I made it go slow so you can see where it goes wrong.

It is also hard to let the row/td's match the other rows while the effect is taking place. I solved that by giving the table and td a fixed size, but that's another problem.