I'm also getting this stuttering when running through the environments and especially cities, and sadly solid state drives do not solve the issue, at least not for everyone. I have an Intel X-25M 80 GB SSD, and it gives me just as bad stuttering in FFXIV as my 7200 rpm SATA drive. I didn't get this stuttering in the beta or early release. I think it started in early November, although my computer was broken at the time so I never knew if it was caused by a version update or conflict with my new hardware. Since then I've tried several different GPUs and hard drives with identical outcome. I want to get back into the game, but the stuttering kills the immersion.

The jittering camera when running on sloped terrain is a seperate issue and it seems to have improved lately, but that was never nearly as annoying as the general stuttering. Hopefully Square Enix can fix it at some point in the future...

CPU: Phenom II x4 @3.7 Ghz
GPU: Radeon HD 5750 / Radeon HD 6850 / GeForce GTX 460
HDD: Intel X-25M 80GB SSD / WD 500GB 7200 rpm SATA