I tried posting a picture but I haven't yet figured out my new camera.
Anyhoo...a couple of the bottom leaves on my Marianna's peace has bright yellow splotches. There are also brown areas on these same leaves. I only see this on the leaves that are near the ground. The plants are heavily mulched with straw and look very good otherwise. I don't see any problems with my other 20 mater plants, it's only on 3 (outta 4) MP.