2 Rose: I like disco, but Gridanian forest doesn't look like disco-club.))
I hadn't got this issue before the patch 1.17 and I didn't change any settings/configuration of the game or my video-card lately. The issue showed up suddenly without any reasons.
To be honest, I can say that I had the similar issue in January 29th, you can see it on a link below:
http://i1092.photobucket.com/albums/...1296333424.jpg
Later, in the begginig of March my old video-card (the same GTX 480, made by Palit) suddenly died because of unknown reason and I bought a new one - GTX480 made by Inno3D. I DO HOPE that the current issue will not bring my new video-card to death. Also I hope that the breakage of my old video-card wasn't connected with a light-glitch in FF XIV. Otherwise somebody has to be responsible for that..