Normal with a IIfx ROM. I was under the impression the IIsi rom is free of that artifact, but I spoke with JDW and he said he still gets it with the IIsi rom.

If that is the case I don't think a IIsi rom would be any more desirable than a IIfx rom, other than that it's rare.

One thing I found on my SE/30 is that the artifact does not show up if you pull the pram battery. But other people did not have the same experience. Don't know why it worked for me.