Dell U2410 problems - rev A05

Hi,

I have been using my new monitor now for a couple of days and have a few problems.

Firstly the worse point.  I have a vertical gradient that starts white at the top and finishes with a dirty white/yellow at the bottom.  As I'm using this for graphics work, this is kind of unusable.  I also seem to have a much brighter lower right corner of the screen. 

I have taken pictures to illustrate these points.  I have a pure black, grey and white image, along with a web page and a cropped version of the webpage which really shows up the gradient problem.

Also, I also found all the presets to be odd (??) out of the box..

Standard is extremely saturated and has a red tint.

aRGB and sRGB have quite a yellow tint - I would have thought aRBG would be more likely to exhibit more green/yellow due to the wide gamut but not sRBG?

Custom seems cool and towards the blues.

Do these presets sound normal?

Thanks in advance...

http://img263.imageshack.us/img263/8916/blackresize.jpg
http://img255.imageshack.us/img255/1170/greyresize.jpg
http://img87.imageshack.us/img87/3782/webpageresize.jpg
http://img96.imageshack.us/img96/1889/webpageresizecrop.jpg
http://img651.imageshack.us/img651/5074/whiteresize.jpg