This has been my experience with some graphical issues:

- Teleporting out of Mor Dhona or any dense populated area has been the main one. The frame rate will slow to a crawl, then eventually crash to the desktop. When I restart the client my character had teleported to my intended destination.

- This has only happened once to me, but has happened quite often with a fellow raid member. Zoning into Turn 3 of Second Coil of Bahamut takes a long time, then when you zone in some of the terrain is missing. A restart of the client fixes this. This is also been experienced in Turn 4 of Second Coil of Bahamut.

- This one hasn't happened in a while, but I used to have issues with some bosses and spell effects displaying, such as Garuda and Ifrit HM/Ex.

I have an Intel i5-2500k CPU, AMD 6970HD video card, 8GB DDR3 RAM, Crucial 512GB SSD HDD.