Hi, Well I got my first ACD last Wednesday, I really loved it until I realised that when it produced the colour blue there would be lighter blue vertical lines running through the colour blue, they could only have been a pixel wide, but were annoying and affected the clarity of the screen when viewed close. Personally, I didn't think it was acceptable for a £950 display which is meant to be colour accurate. So, I rang Apple, TNT came to my house yesterday, and now today I have my new 23 inch ACD which has the same problem!!! I'm starting to think that all Apple ACD's have this? If anyone with a 23 inch ACD could tell me if they get small vertical lines through the colour blue then I'll be really pleased. Maybe I've got two defective displays, but that seems really unlikely. These vertical lines are hard to see but are very annoying, they are very noticeable when you click the Spotlight button in the top left menu bar, and when something is highlighted in blue. Thanks for any help.