This one didn't make the cut, but I got some encouraging feedback from the judges:
Lily Pads Cut in Their Prime
This is a smaller copy of the original I submitted. One judge mentioned that it was a bit noisy, though this didn't detract much from the image. I agree about the noise, and it was one of the things that made me hesitate to submit it. Though I shot at 100 ISO, my K200D (mounted with a Pentax 50-200mm telephoto, focal length at 190mm) doesn't produce crisp dark areas in low light. It was a dark overcast day, and the water was a bit murky and moving and difficult to capture. I only got chance to capture a photo because the lily pads parted and drifted away from sight.
Another mentioned that the line of the "stalk" (the green grass stalk?) was too horizontal, and that he/she would clone out the the "distraction" above the stalk. I think that the distraction the judge spoke of is the little raft of bubbles, and that was the other thing that I puzzled over before submitting it. On the one hand, it could be viewed as a distraction, but on the other hand -- and this is why I retained it -- the bubbles make it clear that the black field is water.
Overall, I'm a bit disappointed, but as I said, I was in two minds about this one, so I can't really take exception that it didn't make it.