The fluctuations of weather can often cause iris fans to bunch up as they emerge, an effect often called 'pineappling'. It is not harmful, and I just clip the affected leaves off. They are quickly replaced. There is another strange formation the fans sometimes do where they are very tightly bound, almost constricted. I don't know what causes this, but I just cut the fan off low down and hope it either dies back or corrects itself. I am not familiar with a 'spring sickness' so can't comment on that, though I have never heard it in reference to irises before.

Mike

I've got a few that are Deformed this year I believe too that its from the weather, my irises just started growing and then we had 5 inches of snow, they're already growing out of "it".