My feeling is that it's more of a cosmetic issue then anything else. Raking up this year's leaves this fall and throwing away may help long term. Here's a link that may help.
http://www.ct.gov/caes/lib/caes/doc...ogy_and_ecology/common_diseases_of_maples.pdf
I don's have the exact same problem but one of my Japanese Maples have small burned leaf tips. They are pre-bonsai trees, and I keep them in a clay pot on a balcony. Here in northeast Ohio it rains at least once a week, temperatures in the day can go up to the 90s and at night it may drop to 65. (USDA Hardiness Zone 5a)
Are burned leaf tips a common issue for Japanese Red maples? If not, what can I do to help my small trees.
Thank you