I can see a bit better, thanks. I'm still not sure what's going on though. It looks to me still as though it could be cold injury with a hint of spring sickness. The degree of chlorosis is more than I would expect to see with both of those problems though, Are these plants stunted (shorter) than other daylilies in the garden - or are these the most advanced in growth?
This is a link to an image gallery for spring sickness - what I'm seeing on yours is a little distortion and some saw-tooth splits/edges in the leaves but not the typical browning. When you look at your plants in the garden do you see any resemblance?
http://web.ncf.ca/ep568/galler...
The chlorosis could be a soil nutritional issue or it, or some of it, could be related to something stopping the nutrients from getting to the leaves.
Do you know exactly how cold it has got since those leaves emerged (or have the leaves been evergreen all winter)?
