Hi m8, i've got the SAME EXACT problem as u.
I've bought 2 I8600 via small biz, for my biz, one screen is WSGA (the one that does 1680x...) and the other one (mine) with WUXGA (1920x1200).
Well as U, have the same issue, well even I see a Vertical band, in the right half of the screen, it's barely noticable, but it's there.
I was pissed off, coz we had 2 wait almost a month to get these 2 systems, & we needed them badly.
I revised the 2 I8600, (thank god & all the ppl here, I had enough info to test everything), overall the units are fairly good, hd ok video ok (no corruption), even mine o'ced @ 400/277 Mhz, & temp dint go beyond 85-90 degC.
All the tests ok, but, BUT the screen, @ first I thought I was too picky with the screen, (as a matter of fact, I wasn't able to find any dead pixel, with the screen all white....), then I reread U'r thread, & VOILA!, exactly the same.
So I called tech, & at first the guy just told me it was normal, in his laptop was the same thing, then I told him that it was a renting with our bizznez bank, & that I'm stopping the payment till they fix this, so he made me wait like 5mins, & then told me that,YES, it is a defective part, that needs to be "adjusted", so I asked him, if by my tag code, he could know the brand of the LCD, & BINGO we got the winner : TOSHIBA.
I asked him 2 send me a SAMSUNG new LCD, @ my bizz, & he told me that the type of care pack that we have doesn't allow us to do that, & that the type of screen will be the same brand, coz if I have a TOSHIBA I will get a TOSHIBA not a SAMSUNG, so I told him that I'd talk to the sales rep.
I don't CARE what type of care pack we have, taking into account that the unit was built with DEFECTIVE parts (mainly the screen), so we wont pay a dime till this is fixed ASAP, and on site.
If they send a tech guy, fine, if they send the lcd, fine.
Anyway this was just to let other ppl know my story.
On the other hand, & would like to thank everyone in here for putting so much info, and scheding some light in this type of problems.
Also thx to the mods, especially DELL Machina, all of U ROCK!
PS: I live in Barcelona / Catalonia / Spain / Europe.
PS2: Sorry for my long posting (I always post long ones, can't help it
PS3: I'll keep U posted about how the thing "evolves".
Updated, here are some pics for U to check out:
Pic1 -> Bottom light
Pic2 -> Lower left corner, jedi sabre light, these are the most visible
Pic3 -> Lower part brighter, even at normal room light