Guild Wars 2

Reintroduction of ambient occlusion causing graphical glitches.
Just putting this out there after a discussion with friend who is a 3D programmer and plays very occasionally. I also 3D model albeit occasionally lately.
The past few weeks, l’ve randomly noticed ’stretched’ textures. At first it was on terrain so l just thought badly stretched mapping though only on a few terrain cells.
Since then l’ve noticed it elsewhere on model polygons.
I haven’t yet taken any SS though will do so next time an example appears. It seems to be very random so difficult to classify as a ’Bug’ at present.

Another glitch that may be related. This glitch was common for me in Black Citadel.
Lately it happens there again sometimes, sometimes not yet porting into Plains of Ashford can cause it.
Problem: When changing instances graphics ’overload’. Can hardly move camera.
It is completely random, can be any zone.
What can fix it:
Zoning back to another zone and in again
Going to character selection screen and reloading

Graphical glitch image

Using Razer Gamebooster

Gigabyte X58A-UD3R
Intel i7 960 3.2
24G Ram
Nvidia 5600 Gtx ti
Nvidia driver: [was 310.33/updated yesterday 310.90]
C: 7200 HDD - game is on F: backup drive which is mostly empty.
Win7 Pro 64bit