Noticed this happening, gets worse when I scroll up and down, it used to happen when I was browsing on my old MBP, but now it is happening on my newest MBP? Any ideas?
As I noted in my response to this thread, things did "seem" to be corrected after a clean install, but today I experienced similar issues to what you are seeing. Things improved after the clean install and the graphical issues are less intense, but still there. I am waiting to see what the next release will do for my system and if the result is zero, then I am going back to Lion.