While checking out the new MacBooks at the local Apple store, I noticed some strange graphics behavior on the 2GHz versions. Navigating to a site with a very intensive Flash animation (e.g., http://www.blizzard.com/diablo3/characters/) caused large black blocks to intermittently flash on the screen. This happened on two of the three 2GHz MacBooks at the store, and none of the 2.4GHz MacBooks or MacBook Pros. Anecdotal, to be sure, but this, plus some posts here earlier on problems getting static on external monitors on the MacBooks makes me a little dubious on the quality control on these new MacBooks (particularly the graphics cards). Has anyone with the new MacBooks had any similar graphics-related experiences?