Answer: According to The Greenhouse and Nursery Handbook, by Francis X. Jozwik (Andmar Press, Wyoming, 1992) "Ethylene may be detected in the greenhouse by introducing young, vigorous tomato plants to suspected areas. If ethylene is present, it will cause leaves to grow downward as if they were wilted even though the tissue is still turgid."
Does this describe the symptoms on the new growth? Or, is there any possibility of something like tobacco mosaic virus? Viruses often cause distortion of foliage. Following are a few web addresses that might have additional information; I didn't have time to read them thoroughly.
I hope this helps you figure out the problem.
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