The phonorecord copyright symbol (U+2117) is the same weight in DejaVu Sans Light as it is in DejaVu Sans. It should be light, matching the regular copyright symbol (U+00A9). The two symbols are often found in proximity to each other in text, so any differences can be noticeable. The two should match, aesthetically.
Fixed in revision 2153. The weight was ajusted to match that of U+00AE '®'.
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