I am experiencing graphic tearing now that Lion is installed. Same settings as under 10.6.8. Examples shown here:
[image=http://www.flickr.com/photos/59563766@N08/5963264538/in/photostream]
[image=http://www.flickr.com/photos/59563766@N08/5962600719/in/photostream]
Edit: After playing this tearing is **only occurring on character models and NPCs. All water, terrain, buildings, Rift objects (flying rocks on air rifts etc) are fine.