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What's worse: Asura have a similar effect. (Toned down from the original version, but graaaah.)
Edit: Edited an old comparison; it's legendary light overlaid on top of legendary medium; I added the blue and green lines to indicate the approximate body lines between medium(green) and light(blue). Not sure if the original image was pre/post change...but a quick check in-game suggests it's hard to tell anyways. http://imgur.com/RUz7xPo
Neither the sylvari nor asura light legendary chest pieces are scaling correctly right now. I've alerted the artist and we're looking in to this. (We thought we'd fixed this but it appears to have resurfaced again.)
I thought they fixed that bug
We did :(