This is a short post to allow me to keep track of all the issues I have seen with graphics when using my Macbook Pro on OS X Lion with an external monitor. There is a thread on the apple discussion forums which is worth a follow too:
The app switcher contrast issue:
If you click the image above you will see the app switcher has very high colour contrast.
The White / invisible app switcher icons:
Click the image above for a better quality image.
Other issues I have seen, but haven’t got screenshots of yet…
White / invisible app switcher icons
Distorted (bold and blurry) text in app windows
App windows which contain diagonal coloured noise
A restart of my mac seems to fix the issues temporarily.