I have also replaced the Aminet version with the latest one, once i discovered it. It has no changelog, i don't know what the differences are, but i don't think i have comfronted any problems with it.
Also, I was reading some old threads and came across one that said that idefix97 should only be used with OS 3.0 and older. I had never heard this before. I have used it with OS 3.9 and never noticed a problem. Is there something I'm missing here?
You only have to disable the scsi.device of AOS 3.9.