MacBook Pro :: Bright Spots Behind LCD Screen?

I've had bright spots appear behind my LCD screen for the second time this last month.

They look like the LEDS from the backlight are pushed up too close to the LCD and sort of washout the LCD in that area. The have occurred on the left side and the right sides along the lower edges of the screen.

I'm fed up with all the repairs this laptop has needed and feeling that I paid 2000 dollars for a quality product I went to the apple store today and asked for a replacement unit.

I was told that the recurring bright spots (on top of 3 other minor repairs and 1 major repair) did not warrant a replacement unit. The manager even said that they shouldn't have fixed this problem last time because it is cosmetic and not covered by the warranty. The genius also repeated the phase "This doesn't happen by itself" (I nice way to say I did this and that they shouldn't cover it. )

The manager decided to make me feel special and say something along the lines "We'll fix it again this time because we did last time".

My warranty is running out in 6 months and I need to know what's causing this. I always transport my laptop in an incase sleeve with a shoulder strap. There have never been any external marks on my casing when these dots appear. If I put too much pressure on the screen wouldn't the middle bend in more and I would get problems there? There weren't even marks on the screen from the keyboard keys yet I put enough pressure on it to cause this without even knowing it?

The best part is I asked the man who gave me my repaired laptop back how to prevent what the manager called 'LCD bruising'. When I mentioned bright spots he said 'Oh that's a defect we cover under warranty'.

Im going to contact apple's customer relations on monday regarding the repeated repair trips. I have no confidence this laptop can go a long period of time without needing repairs.