Those are different data lines misbehaving now.

Tough to diagnose accurately, as there are so many devices on that bus. SMC, USB, IDE, cs4231a. All sharing the same pins.

But yeah, do the cs4231a fix just to be sure. That will eliminate it as a possible source of problems.

For the SMC chip, I'm not sure if just lifting one pin is enough, or if they all have to be lifted. EDIT: oh, you did that already!

But it STILL looks like just bad connections on the IDE to me. Maybe loose crimps on the ribbon cable, or ????